diff --git a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/file/convertor/EvalProjectArchiveFileCmdConvertor.java b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/file/convertor/EvalProjectArchiveFileCmdConvertor.java
index ec66ed89..84f50a8d 100644
--- a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/file/convertor/EvalProjectArchiveFileCmdConvertor.java
+++ b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/file/convertor/EvalProjectArchiveFileCmdConvertor.java
@@ -1,11 +1,15 @@
 package org.qinan.safetyeval.app.file.convertor;
 
+import cn.hutool.json.JSONUtil;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
 import org.qinan.safetyeval.client.file.request.EvalProjectArchiveFileAddCmd;
 import org.qinan.safetyeval.client.file.request.EvalProjectArchiveFileUpdateCmd;
+import org.qinan.safetyeval.client.file.response.FilesCo;
 import org.qinan.safetyeval.domain.file.model.EvalProjectArchiveFileE;
 
+import java.util.List;
+
 /**
  * 安全评价项目档案文件转换
  *
@@ -15,7 +19,7 @@ import org.qinan.safetyeval.domain.file.model.EvalProjectArchiveFileE;
 @Mapper(componentModel = "spring")
 public interface EvalProjectArchiveFileCmdConvertor {
     /**
-     * cmd_add转领域模型
+     * cmd_add转领域模型（files 为对象列表，经 fromFilesCo 序列化为 JSON 字符串）
      *
      * @param evalProjectArchiveFileAddCmd
      * @return
@@ -24,11 +28,21 @@ public interface EvalProjectArchiveFileCmdConvertor {
     EvalProjectArchiveFileE convertCmdToE(EvalProjectArchiveFileAddCmd evalProjectArchiveFileAddCmd);
 
     /**
-     * cmd_update转领域模型
+     * cmd_update转领域模型（files 为对象列表，经 fromFilesCo 序列化为 JSON 字符串）
      *
      * @param evalProjectArchiveFileUpdateCmd
      * @return
      */
     @Mapping(target = "evalProjectArchiveFileGateway", ignore = true)
     EvalProjectArchiveFileE convertCmdToE(EvalProjectArchiveFileUpdateCmd evalProjectArchiveFileUpdateCmd);
+
+    /**
+     * 将 Cmd 中 files 对象列表序列化为 JSON 数组字符串（如 [{"url":"...","name":"..."}]），null 返回 null。
+     */
+    default String fromFilesCo(List<FilesCo> files) {
+        if (files == null) {
+            return null;
+        }
+        return JSONUtil.toJsonStr(files);
+    }
 }
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/request/EvalProjectArchiveFileAddCmd.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/request/EvalProjectArchiveFileAddCmd.java
index 7bb88ae6..8fd8c149 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/request/EvalProjectArchiveFileAddCmd.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/request/EvalProjectArchiveFileAddCmd.java
@@ -2,11 +2,13 @@ package org.qinan.safetyeval.client.file.request;
 
 import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
+import org.qinan.safetyeval.client.file.response.FilesCo;
 import org.qinan.safetyeval.domain.constant.ArchiveTypeEnum;
 
 import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.Size;
 import java.io.Serializable;
+import java.util.List;
 
 /**
  * 安全评价项目档案文件新增Cmd
@@ -22,9 +24,8 @@ public class EvalProjectArchiveFileAddCmd implements Serializable {
     @NotBlank(message = "项目ID不能为空")
     private String projectId;
 
-    @ApiModelProperty(value = "文件列表（JSON 数组，如 [{\"url\":\"...\",\"name\":\"...\"}]）", required = true)
-    @NotBlank(message = "文件列表不能为空")
-    private String files;
+    @ApiModelProperty(value = "文件列表")
+    private List<FilesCo> files;
 
     @ApiModelProperty(value = ArchiveTypeEnum.REMARKS, required = true)
     @NotBlank(message = ArchiveTypeEnum.REMARKS + "不能为空")
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/request/EvalProjectArchiveFileUpdateCmd.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/request/EvalProjectArchiveFileUpdateCmd.java
index ce7d65fb..ea606316 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/request/EvalProjectArchiveFileUpdateCmd.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/request/EvalProjectArchiveFileUpdateCmd.java
@@ -3,12 +3,14 @@ package org.qinan.safetyeval.client.file.request;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
+import org.qinan.safetyeval.client.file.response.FilesCo;
 import org.qinan.safetyeval.domain.constant.ArchiveTypeEnum;
 
 import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.Size;
 import java.io.Serializable;
+import java.util.List;
 
 /**
  * 安全评价项目档案文件修改Cmd
@@ -28,11 +30,10 @@ public class EvalProjectArchiveFileUpdateCmd implements Serializable {
     @NotBlank(message = "项目ID不能为空")
     private String projectId;
     /**
-     * 文件列表（JSON 数组，如 [{"url":"...","name":"..."}]）
+     * 文件列表
      */
-    @ApiModelProperty(value = "文件列表（JSON 数组，如 [{\"url\":\"...\",\"name\":\"...\"}]）", required = true)
-    @NotBlank(message = "文件列表不能为空")
-    private String files;
+    @ApiModelProperty(value = "文件列表")
+    private List<FilesCo> files;
     /**
      * ArchiveTypeEnum.REMARKS
      */
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/response/EvalProjectArchiveFileCo.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/response/EvalProjectArchiveFileCo.java
index d3ab55ab..79c317e4 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/response/EvalProjectArchiveFileCo.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/response/EvalProjectArchiveFileCo.java
@@ -6,6 +6,8 @@ import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
 import org.qinan.safetyeval.domain.constant.ArchiveTypeEnum;
 
+import java.util.List;
+
 /**
  * 安全评价项目档案文件Co
  *
@@ -23,10 +25,10 @@ public class EvalProjectArchiveFileCo extends ClientObject {
     @ApiModelProperty(value = "项目ID")
     private String projectId;
     /**
-     * 文件列表（JSON 数组，如 [{"url":"...","name":"..."}]）
+     * 文件列表（由 DO 中 JSON 数组 [{"url":"...","name":"..."}] 解析而来）
      */
     @ApiModelProperty(value = "文件列表")
-    private String files;
+    private List<FilesCo> files;
     /**
      * ArchiveTypeEnum.REMARKS
      */
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/response/FilesCo.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/response/FilesCo.java
new file mode 100644
index 00000000..6a5812d1
--- /dev/null
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/file/response/FilesCo.java
@@ -0,0 +1,26 @@
+package org.qinan.safetyeval.client.file.response;
+
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+import java.io.Serializable;
+
+/**
+ * 档案文件信息Co（对应 eval_project_archive_file.files JSON 数组中的元素）
+ *
+ * @Author: ltq
+ * @date 2026-08-25
+ */
+@Data
+public class FilesCo implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    @ApiModelProperty(value = "文件ID")
+    private String id;
+
+    @ApiModelProperty(value = "文件地址")
+    private String url;
+
+    @ApiModelProperty(value = "文件名称")
+    private String name;
+}
diff --git a/safety-eval-infrastructure/src/main/java/org/qinan/safetyeval/infrastructure/convertor/EvalProjectArchiveFileDoConvertor.java b/safety-eval-infrastructure/src/main/java/org/qinan/safetyeval/infrastructure/convertor/EvalProjectArchiveFileDoConvertor.java
index af297ed8..90b23522 100644
--- a/safety-eval-infrastructure/src/main/java/org/qinan/safetyeval/infrastructure/convertor/EvalProjectArchiveFileDoConvertor.java
+++ b/safety-eval-infrastructure/src/main/java/org/qinan/safetyeval/infrastructure/convertor/EvalProjectArchiveFileDoConvertor.java
@@ -1,11 +1,15 @@
 package org.qinan.safetyeval.infrastructure.convertor;
 
+import cn.hutool.core.util.StrUtil;
+import cn.hutool.json.JSONUtil;
 import org.mapstruct.Mapper;
 import org.qinan.safetyeval.client.file.request.EvalProjectArchiveFilePageQry;
 import org.qinan.safetyeval.client.file.response.EvalProjectArchiveFileCo;
+import org.qinan.safetyeval.client.file.response.FilesCo;
 import org.qinan.safetyeval.domain.file.model.EvalProjectArchiveFileE;
 import org.qinan.safetyeval.infrastructure.persistence.domainobject.EvalProjectArchiveFileDO;
 
+import java.util.Collections;
 import java.util.List;
 
 
@@ -26,7 +30,7 @@ public interface EvalProjectArchiveFileDoConvertor {
     EvalProjectArchiveFileDO convertEeToDo(EvalProjectArchiveFileE evalProjectArchiveFileE);
 
     /**
-     * DO转Co
+     * DO转Co（files 为 JSON 字符串，经 toFilesCo 解析为对象列表）
      *
      * @param evalProjectArchiveFileDo DO
      * @return
@@ -44,10 +48,20 @@ public interface EvalProjectArchiveFileDoConvertor {
     EvalProjectArchiveFileDO convertQryToDo(EvalProjectArchiveFilePageQry evalProjectArchiveFilePageQry);
 
     /**
-     * DOs转Cos
+     * DOs转Cos（files 为 JSON 字符串，经 toFilesCo 解析为对象列表）
      *
      * @param evalProjectArchiveFileDos dos
      * @return
      */
     List<EvalProjectArchiveFileCo> converDosToCos(List<EvalProjectArchiveFileDO> evalProjectArchiveFileDos);
+
+    /**
+     * 将 DO 中 files 的 JSON 数组字符串（如 [{"url":"...","name":"..."}]）解析为 FilesCo 列表，空串返回空列表。
+     */
+    default List<FilesCo> toFilesCo(String files) {
+        if (StrUtil.isBlank(files)) {
+            return Collections.emptyList();
+        }
+        return JSONUtil.toList(files, FilesCo.class);
+    }
 }