diff --git a/models/approval_instance.json b/models/approval_instance.json
index 1987c3b..2eee323 100644
--- a/models/approval_instance.json
+++ b/models/approval_instance.json
@@ -59,33 +59,37 @@
     "indexes": [
         {
             "name": "idx_instance_workflow",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "workflow_id"
             ],
-            "type": "normal"
+            "idxtype": "index"
         },
         {
             "name": "idx_instance_business",
-            "fields": [
+            "type": "normal",
+            "comment": "复合索引：按业务类型和记录查询",
+            "idxfields": [
                 "business_type",
                 "business_id"
             ],
-            "type": "normal",
-            "comment": "复合索引：按业务类型和记录查询"
+            "idxtype": "index"
         },
         {
             "name": "idx_instance_status",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "status"
             ],
-            "type": "normal"
+            "idxtype": "index"
         },
         {
             "name": "idx_instance_initiator",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "initiator_id"
             ],
-            "type": "normal"
+            "idxtype": "index"
         }
     ],
     "codes": [
diff --git a/models/approval_step.json b/models/approval_step.json
index c02de36..cb89af7 100644
--- a/models/approval_step.json
+++ b/models/approval_step.json
@@ -49,19 +49,21 @@
     "indexes": [
         {
             "name": "idx_step_workflow",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "workflow_id"
             ],
-            "type": "normal"
+            "idxtype": "index"
         },
         {
             "name": "idx_step_order",
-            "fields": [
+            "type": "normal",
+            "comment": "复合索引：按工作流和顺序查询",
+            "idxfields": [
                 "workflow_id",
                 "step_number"
             ],
-            "type": "normal",
-            "comment": "复合索引：按工作流和顺序查询"
+            "idxtype": "index"
         }
     ],
     "codes": [
diff --git a/models/approval_task.json b/models/approval_task.json
index 68cdcd6..aea02ca 100644
--- a/models/approval_task.json
+++ b/models/approval_task.json
@@ -53,24 +53,27 @@
     "indexes": [
         {
             "name": "idx_task_instance",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "instance_id"
             ],
-            "type": "normal"
+            "idxtype": "index"
         },
         {
             "name": "idx_task_assignee",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "assignee_id"
             ],
-            "type": "normal"
+            "idxtype": "index"
         },
         {
             "name": "idx_task_status",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "status"
             ],
-            "type": "normal"
+            "idxtype": "index"
         }
     ],
     "codes": [
diff --git a/models/approval_workflow.json b/models/approval_workflow.json
index 7c58272..c8cbd0c 100644
--- a/models/approval_workflow.json
+++ b/models/approval_workflow.json
@@ -54,24 +54,27 @@
     "indexes": [
         {
             "name": "idx_workflow_module",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "module"
             ],
-            "type": "normal"
+            "idxtype": "index"
         },
         {
             "name": "idx_workflow_org",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "org_id"
             ],
-            "type": "normal"
+            "idxtype": "index"
         },
         {
             "name": "idx_workflow_status",
-            "fields": [
+            "type": "normal",
+            "idxfields": [
                 "status"
             ],
-            "type": "normal"
+            "idxtype": "index"
         }
     ],
     "codes": [