diff --git a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/institution/EvalInternalReviewExecutor.java b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/institution/EvalInternalReviewExecutor.java
index 51d19e8..67cb046 100644
--- a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/institution/EvalInternalReviewExecutor.java
+++ b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/institution/EvalInternalReviewExecutor.java
@@ -98,6 +98,7 @@ public class EvalInternalReviewExecutor implements EvalInternalReviewApi {
             throw new BizException(ErrorCode.EVAL_PROJECT_ARCHIVED);
         }
 
+        // 修改数据是否存在
         EvalInternalReviewEntity entity = evalInternalReviewConvertor.applyConfirmCmd(cmd);
         EvalInternalReviewDO evalInternalReviewDO = null;
         if (cmd.getId() != null) {
@@ -108,6 +109,7 @@ public class EvalInternalReviewExecutor implements EvalInternalReviewApi {
             }
         }
 
+        // 是否签字完成
         if (cmd.getResultCode().equals(EvalReviewEnum.PASSED.getCode())) {
             if (evalInternalReviewDO == null) {
                 throw new BizException(ASSIGN_SIGN_TASK);
@@ -142,6 +144,31 @@ public class EvalInternalReviewExecutor implements EvalInternalReviewApi {
     @Override
     @Transactional(rollbackFor = Exception.class)
     public SingleResponse<Void> assign(EvalInternalReviewAssignCmd cmd) {
+        Long projectId = cmd.getProjectId();
+        EvalProjectEntity project = evalProjectNodeSupport.requireProject(projectId);
+        // 判断项目是否归档
+        if (project.getArchiveFlag() != null && project.getArchiveFlag() == 1) {
+            throw new BizException(ErrorCode.EVAL_PROJECT_ARCHIVED);
+        }
+        EvalInternalReviewEntity entity = evalInternalReviewGateway.getByProjectId(projectId, project.getOrgId());
+        if (entity == null) {
+            // 没有数据则新增，并下发签字任务
+            entity = new EvalInternalReviewEntity();
+            entity.setOrgId(project.getOrgId());
+            entity.setProjectId(projectId);
+            entity.setStatusCode(1);
+            entity.setReviewerSignatureTaskStatus(SignatureTaskStatusEnum.DISPATCHED.getCode());
+            evalInternalReviewGateway.save(entity);
+        } else {
+            // 已存在数据，若已下发则提示不要重复下发
+            if (SignatureTaskStatusEnum.DISPATCHED.getCode().equals(entity.getReviewerSignatureTaskStatus())) {
+                throw new BizException(ErrorCode.SIGN_TASK_ALREADY_DISPATCHED);
+            }
+            entity.setReviewerSignatureTaskStatus(SignatureTaskStatusEnum.DISPATCHED.getCode());
+            evalInternalReviewGateway.modify(entity);
+        }
+
+        // todo 保存任务
         return SingleResponse.success();
     }
 
diff --git a/safety-eval-domain/src/main/java/org/qinan/safetyeval/domain/constant/SignatureTaskStatusEnum.java b/safety-eval-domain/src/main/java/org/qinan/safetyeval/domain/constant/SignatureTaskStatusEnum.java
new file mode 100644
index 0000000..b9536d3
--- /dev/null
+++ b/safety-eval-domain/src/main/java/org/qinan/safetyeval/domain/constant/SignatureTaskStatusEnum.java
@@ -0,0 +1,41 @@
+package org.qinan.safetyeval.domain.constant;
+
+/**
+ * 审核签字任务状态枚举
+ *
+ * @author safety-eval
+ */
+public enum SignatureTaskStatusEnum {
+
+    DISPATCHED("dispatched", "下发"),
+    NON_DISPATCHED("non_dispatched", "未下发"),
+    COMPLETED("completed", "已完成");
+
+    private final String code;
+    private final String name;
+
+    SignatureTaskStatusEnum(String code, String name) {
+        this.code = code;
+        this.name = name;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public static SignatureTaskStatusEnum ofCode(String code) {
+        if (code == null) {
+            return null;
+        }
+        for (SignatureTaskStatusEnum item : values()) {
+            if (item.code.equals(code)) {
+                return item;
+            }
+        }
+        return null;
+    }
+}
diff --git a/safety-eval-domain/src/main/java/org/qinan/safetyeval/domain/exception/ErrorCode.java b/safety-eval-domain/src/main/java/org/qinan/safetyeval/domain/exception/ErrorCode.java
index 4ab7438..29f9ebb 100644
--- a/safety-eval-domain/src/main/java/org/qinan/safetyeval/domain/exception/ErrorCode.java
+++ b/safety-eval-domain/src/main/java/org/qinan/safetyeval/domain/exception/ErrorCode.java
@@ -119,6 +119,7 @@ public enum ErrorCode {
      */
     ASSIGN_SIGN_TASK("04-02-001", "请先下发签字任务"),
     SIGN_TASK_NOT_COMPLETE("04-02-002", "签字任务未完成"),
+    SIGN_TASK_ALREADY_DISPATCHED("04-02-003", "签字任务已下发，请勿重复下发"),
 
     // gbs
     GBS_USER_ERROR("04-01-001", "gbs用户未登录"),