diff --git a/src/app.module.ts b/src/app.module.ts
index de220bc..27710c1 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -29,6 +29,7 @@ import { VehicleUsageModule } from './modules/vehicle-usage/vehicle-usage.module
 import { VehicleUsageController } from './modules/vehicle-usage/vehicle-usage.controller';
 import { VehicleUsageService } from './modules/vehicle-usage/vehicle-usage.service';
 import { MaterialsInventoryModule } from './modules/materials_inventory/materials_inventory.module';
+import { CompanyModule } from './modules/company/company.module';
 
 @Module({
   imports: [
@@ -61,7 +62,9 @@ import { MaterialsInventoryModule } from './modules/materials_inventory/material
 
     VehicleUsageModule,
 
-    MaterialsInventoryModule
+    MaterialsInventoryModule,
+
+    CompanyModule
   ],
   providers: [
     { provide: APP_FILTER, useClass: AllExceptionsFilter },
diff --git a/src/constants/enum/index.ts b/src/constants/enum/index.ts
index 5444016..75f926d 100644
--- a/src/constants/enum/index.ts
+++ b/src/constants/enum/index.ts
@@ -1,6 +1,14 @@
+// 字典项status
 export enum DictTypeStatusEnum {
   /** 启用 */
   ENABLE = 1,
   /** 禁用 */
   DISABLE = 0
 }
+
+// 业务模块枚举
+export enum BusinessModuleEnum {
+  CONTRACT = 1,
+  MATERIALS_INVENTORY = 2,
+  COMPANY = 3
+}
diff --git a/src/modules/company/company.controller.ts b/src/modules/company/company.controller.ts
new file mode 100644
index 0000000..0333d14
--- /dev/null
+++ b/src/modules/company/company.controller.ts
@@ -0,0 +1,79 @@
+import {
+  Body,
+  Controller,
+  Get,
+  Query,
+  Put,
+  Delete,
+  Post,
+  BadRequestException
+} from '@nestjs/common';
+import { ApiOperation, ApiTags } from '@nestjs/swagger';
+import { Perm, definePermission } from '../auth/decorators/permission.decorator';
+import { ApiSecurityAuth } from '~/common/decorators/swagger.decorator';
+import { CompanyService } from './company.service';
+import { ApiResult } from '~/common/decorators/api-result.decorator';
+import { CompanyEntity } from './company.entity';
+import { CompanyDto, CompanyQueryDto, CompanyUpdateDto } from './company.dto';
+import { IdParam } from '~/common/decorators/id-param.decorator';
+export const permissions = definePermission('app:company', {
+  LIST: 'list',
+  CREATE: 'create',
+  READ: 'read',
+  UPDATE: 'update',
+  DELETE: 'delete'
+} as const);
+
+@ApiTags('Company - 公司') 
+@ApiSecurityAuth()
+@Controller('company')
+export class CompanyController {
+  constructor(private companyService: CompanyService) {}
+
+  @Get()
+  @ApiOperation({ summary: '获取公司列表' })
+  @ApiResult({ type: [CompanyEntity], isPage: true })
+  @Perm(permissions.LIST)
+  async list(@Query() dto: CompanyQueryDto) {
+    return this.companyService.findAll(dto);
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: '获取公司信息' })
+  @ApiResult({ type: CompanyDto })
+  @Perm(permissions.READ)
+  async info(@IdParam() id: number) {
+    return this.companyService.info(id);
+  }
+
+  @Post()
+  @ApiOperation({ summary: '新增公司' })
+  @Perm(permissions.CREATE)
+  async create(@Body() dto: CompanyDto): Promise<void> {
+    await this.companyService.create(dto);
+  }
+
+  @Put(':id')
+  @ApiOperation({ summary: '更新公司' })
+  @Perm(permissions.UPDATE)
+  async update(@IdParam() id: number, @Body() dto: CompanyUpdateDto): Promise<void> {
+    await this.companyService.update(id, dto);
+  }
+
+  @Delete(':id')
+  @ApiOperation({ summary: '删除公司' })
+  @Perm(permissions.DELETE)
+  async delete(@IdParam() id: number): Promise<void> {
+    await this.companyService.delete(id);
+  }
+
+  @Put('unlink-attachments/:id')
+  @ApiOperation({ summary: '附件解除关联' })
+  @Perm(permissions.UPDATE)
+  async unlinkAttachments(
+    @IdParam() id: number,
+    @Body() { fileIds }: CompanyUpdateDto
+  ): Promise<void> {
+    await this.companyService.unlinkAttachments(id, fileIds);
+  }
+}
diff --git a/src/modules/company/company.dto.ts b/src/modules/company/company.dto.ts
new file mode 100644
index 0000000..d388b4d
--- /dev/null
+++ b/src/modules/company/company.dto.ts
@@ -0,0 +1,39 @@
+import { ApiProperty, IntersectionType, PartialType } from '@nestjs/swagger';
+import {
+  IsArray,
+  IsDate,
+  IsDateString,
+  IsIn,
+  IsInt,
+  IsNumber,
+  IsOptional,
+  IsString,
+  Matches,
+  MinLength
+} from 'class-validator';
+import { PagerDto } from '~/common/dto/pager.dto';
+import { Storage } from '../tools/storage/storage.entity';
+import { IsUnique } from '~/shared/database/constraints/unique.constraint';
+import { CompanyEntity } from './company.entity';
+
+export class CompanyDto {
+  @ApiProperty({ description: '公司名称' })
+  @IsUnique(CompanyEntity, { message: '已存在同名公司' })
+  @IsString()
+  name: string;
+
+  @ApiProperty({ description: '附件' })
+  files: Storage[];
+}
+
+export class CompanyUpdateDto extends PartialType(CompanyDto) {
+  @ApiProperty({ description: '附件' })
+  @IsOptional()
+  @IsArray()
+  fileIds: number[];
+}
+
+export class CompanyQueryDto extends IntersectionType(
+  PagerDto<CompanyDto>,
+  PartialType(CompanyDto)
+) {}
diff --git a/src/modules/company/company.entity.ts b/src/modules/company/company.entity.ts
new file mode 100644
index 0000000..38d7428
--- /dev/null
+++ b/src/modules/company/company.entity.ts
@@ -0,0 +1,29 @@
+import { ApiHideProperty, ApiProperty } from '@nestjs/swagger';
+import { Column, Entity, JoinTable, ManyToMany, Relation } from 'typeorm';
+import { CommonEntity } from '~/common/entity/common.entity';
+import { Storage } from '../tools/storage/storage.entity';
+
+@Entity({ name: 'company' })
+export class CompanyEntity extends CommonEntity {
+  @Column({
+    name: 'name',
+    type: 'varchar',
+    unique: true,
+    length: 255,
+    comment: '公司名称'
+  })
+  @ApiProperty({ description: '公司名称' })
+  name: string;
+
+  @Column({ name: 'is_delete', type: 'tinyint', default: 0, comment: '是否删除' })
+  @ApiProperty({ description: '删除状态：0未删除，1已删除' })
+  isDelete: number;
+
+  @ManyToMany(() => Storage, storage => storage.companys)
+  @JoinTable({
+    name: 'company_storage',
+    joinColumn: { name: 'company_id', referencedColumnName: 'id' },
+    inverseJoinColumn: { name: 'file_id', referencedColumnName: 'id' }
+  })
+  files: Relation<Storage[]>;
+}
diff --git a/src/modules/company/company.module.ts b/src/modules/company/company.module.ts
new file mode 100644
index 0000000..5fba5b1
--- /dev/null
+++ b/src/modules/company/company.module.ts
@@ -0,0 +1,14 @@
+import { Module } from '@nestjs/common';
+import { CompanyController } from './company.controller';
+import { CompanyService } from './company.service';
+import { CompanyEntity } from './company.entity';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { StorageModule } from '../tools/storage/storage.module';
+import { DatabaseModule } from '~/shared/database/database.module';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([CompanyEntity]), StorageModule, DatabaseModule],
+  controllers: [CompanyController],
+  providers: [CompanyService]
+})
+export class CompanyModule {}
diff --git a/src/modules/company/company.service.ts b/src/modules/company/company.service.ts
new file mode 100644
index 0000000..c0f2465
--- /dev/null
+++ b/src/modules/company/company.service.ts
@@ -0,0 +1,127 @@
+import { Injectable } from '@nestjs/common';
+import { InjectEntityManager, InjectRepository } from '@nestjs/typeorm';
+import { CompanyEntity } from './company.entity';
+import { EntityManager, Like, Repository } from 'typeorm';
+import { CompanyDto, CompanyQueryDto, CompanyUpdateDto } from './company.dto';
+import { Pagination } from '~/helper/paginate/pagination';
+import { paginate } from '~/helper/paginate';
+import { Storage } from '../tools/storage/storage.entity';
+import { BusinessException } from '~/common/exceptions/biz.exception';
+import { ErrorEnum } from '~/constants/error-code.constant';
+import { fieldSearch } from '~/shared/database/field-search';
+
+@Injectable()
+export class CompanyService {
+  constructor(
+    @InjectEntityManager() private entityManager: EntityManager,
+    @InjectRepository(CompanyEntity)
+    private companyRepository: Repository<CompanyEntity>,
+    @InjectRepository(Storage)
+    private storageRepository: Repository<Storage>
+  ) {}
+
+  /**
+   * 查询所有公司
+   */
+  async findAll({
+    page,
+    pageSize,
+    ...fields
+  }: CompanyQueryDto): Promise<Pagination<CompanyEntity>> {
+    const queryBuilder = this.companyRepository
+      .createQueryBuilder('company')
+      .leftJoin('company.files', 'files')
+      .addSelect(['files.id', 'files.path'])
+      .where(fieldSearch(fields))
+      .andWhere('company.isDelete = 0');
+
+    return paginate<CompanyEntity>(queryBuilder, {
+      page,
+      pageSize
+    });
+  }
+
+  /**
+   * 新增
+   */
+  async create(dto: CompanyDto): Promise<void> {
+    await this.companyRepository.insert(dto);
+  }
+
+  /**
+   * 更新
+   */
+  async update(id: number, { fileIds, ...data }: Partial<CompanyUpdateDto>): Promise<void> {
+    await this.entityManager.transaction(async manager => {
+      await manager.update(CompanyEntity, id, {
+        ...data
+      });
+      const company = await this.companyRepository
+        .createQueryBuilder('company')
+        .leftJoinAndSelect('company.files', 'files')
+        .where('company.id = :id', { id })
+        .getOne();
+      if (fileIds?.length) {
+        const count = await this.storageRepository
+          .createQueryBuilder('storage')
+          .where('storage.id in(:fileIds)', { fileIds })
+          .getCount();
+        if (count !== fileIds?.length) {
+          throw new BusinessException(ErrorEnum.STORAGE_NOT_FOUND);
+        }
+        // 附件要批量更新
+        await manager
+          .createQueryBuilder()
+          .relation(CompanyEntity, 'files')
+          .of(id)
+          .addAndRemove(fileIds, company.files);
+      }
+    });
+  }
+
+  /**
+   * 删除
+   */
+  async delete(id: number): Promise<void> {
+    // 合同比较重要，做逻辑删除
+    await this.companyRepository.update(id, { isDelete: 1 });
+  }
+
+  /**
+   * 获取单个合同信息
+   */
+  async info(id: number) {
+    const info = await this.companyRepository
+      .createQueryBuilder('company')
+      .where({
+        id
+      })
+      .andWhere('company.isDelete = 0')
+      .getOne();
+    return info;
+  }
+
+  /**
+   * 解除附件关联
+   * @param id 合同ID
+   * @param fileIds 附件ID
+   */
+  async unlinkAttachments(id: number, fileIds: number[]) {
+    await this.entityManager.transaction(async manager => {
+      const company = await this.companyRepository
+        .createQueryBuilder('company')
+        .leftJoinAndSelect('company.files', 'files')
+        .where('company.id = :id', { id })
+        .getOne();
+      const linkedFiles = company.files
+        .map(item => item.id)
+        .filter(item => !fileIds.includes(item));
+      // 附件要批量更新
+      await manager
+        .createQueryBuilder()
+        .relation(CompanyEntity, 'files')
+        .of(id)
+        .addAndRemove(linkedFiles, company.files);
+    });
+  }
+}
diff --git a/src/modules/contract/contract.service.ts b/src/modules/contract/contract.service.ts
index 6ff5b66..030ea1a 100644
--- a/src/modules/contract/contract.service.ts
+++ b/src/modules/contract/contract.service.ts
@@ -9,6 +9,7 @@ import { paginate } from '~/helper/paginate';
 import { Storage } from '../tools/storage/storage.entity';
 import { BusinessException } from '~/common/exceptions/biz.exception';
 import { ErrorEnum } from '~/constants/error-code.constant';
+import { fieldSearch } from '~/shared/database/field-search';
 
 @Injectable()
 export class ContractService {
@@ -19,27 +20,20 @@ export class ContractService {
     @InjectRepository(Storage)
     private storageRepository: Repository<Storage>
   ) {}
+
   /**
-   * 列举所有角色：除去超级管理员
+   * 查找所有合同
    */
   async findAll({
     page,
     pageSize,
-    contractNumber,
-    title,
-    type,
-    status
+    ...fields
   }: ContractQueryDto): Promise<Pagination<ContractEntity>> {
     const queryBuilder = this.contractRepository
       .createQueryBuilder('contract')
       .leftJoin('contract.files', 'files')
       .addSelect(['files.id', 'files.path'])
-      .where({
-        ...(contractNumber ? { contractNumber: Like(`%${contractNumber}%`) } : null),
-        ...(title ? { title: Like(`%${title}%`) } : null),
-        ...(isNumber(type) ? { type } : null),
-        ...(isNumber(status) ? { status } : null)
-      })
+      .where(fieldSearch(fields))
       .andWhere('contract.isDelete = 0');
 
     return paginate<ContractEntity>(queryBuilder, {
diff --git a/src/modules/materials_inventory/materials_inventory.entity.ts b/src/modules/materials_inventory/materials_inventory.entity.ts
index 039574a..c0432f4 100644
--- a/src/modules/materials_inventory/materials_inventory.entity.ts
+++ b/src/modules/materials_inventory/materials_inventory.entity.ts
@@ -192,7 +192,7 @@ export class MaterialsInventoryEntity extends CommonEntity {
   @ApiProperty({ description: '删除状态：0未删除，1已删除' })
   isDelete: number;
 
-  @ManyToMany(() => Storage, storage => storage.contracts)
+  @ManyToMany(() => Storage, storage => storage.materialsInventories)
   @JoinTable({
     name: 'materials_inventory_storage',
     joinColumn: { name: 'materials_inventory_id', referencedColumnName: 'id' },
diff --git a/src/modules/tools/storage/storage.entity.ts b/src/modules/tools/storage/storage.entity.ts
index 69253a5..d84c97e 100644
--- a/src/modules/tools/storage/storage.entity.ts
+++ b/src/modules/tools/storage/storage.entity.ts
@@ -2,7 +2,9 @@ import { ApiHideProperty, ApiProperty } from '@nestjs/swagger';
 import { Column, Entity, ManyToMany, Relation } from 'typeorm';
 
 import { CommonEntity } from '~/common/entity/common.entity';
+import { CompanyEntity } from '~/modules/company/company.entity';
 import { ContractEntity } from '~/modules/contract/contract.entity';
+import { MaterialsInventoryEntity } from '~/modules/materials_inventory/materials_inventory.entity';
 
 @Entity({ name: 'tool_storage' })
 export class Storage extends CommonEntity {
@@ -42,4 +44,12 @@ export class Storage extends CommonEntity {
   @ApiHideProperty()
   @ManyToMany(() => ContractEntity, contract => contract.files)
   contracts: Relation<ContractEntity[]>;
+
+  @ApiHideProperty()
+  @ManyToMany(() => CompanyEntity, company => company.files)
+  companys: Relation<CompanyEntity[]>;
+
+  @ApiHideProperty()
+  @ManyToMany(() => MaterialsInventoryEntity, materialsInventories => materialsInventories.files)
+  materialsInventories: Relation<MaterialsInventoryEntity[]>;
 }
diff --git a/src/shared/database/field-search/index.ts b/src/shared/database/field-search/index.ts
new file mode 100644
index 0000000..f44e3d6
--- /dev/null
+++ b/src/shared/database/field-search/index.ts
@@ -0,0 +1,24 @@
+import { isNumber } from 'lodash';
+import { Like, ObjectLiteral, ObjectType } from 'typeorm';
+export const fieldSearch = <T>(entity: Partial<T>): ObjectLiteral => {
+  let result = {};
+  for (let key in entity) {
+    if (entity.hasOwnProperty(key)) {
+      switch (typeof entity[key]) {
+        case 'number':
+          result = { ...result, ...(isNumber(entity[key]) ? { [key]: entity[key] } : null) };
+          break;
+        case 'string':
+          result = { ...result, ...(entity[key] ? { [key]: Like(`%${entity[key]}%`) } : null) };
+          break;
+        case 'boolean':
+          result = { ...result, ...(entity[key] === true ? { [key]: 1 } : { [key]: 0 }) };
+          break;
+        default:
+          result = { ...result, ...(entity[key] ? { [key]: entity[key] } : null) };
+          break;
+      }
+    }
+  }
+  return result;
+};