diff --git a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/WorkflowInstanceServiceImpl.java b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/WorkflowInstanceServiceImpl.java
index 7ae19e010f03..8c4f7746ecf3 100644
--- a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/WorkflowInstanceServiceImpl.java
+++ b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/WorkflowInstanceServiceImpl.java
@@ -820,28 +820,29 @@ public Map<String, Object> viewVariables(long projectCode, Integer workflowInsta
         Map<String, String> timeParams = BusinessTimeUtils
                 .getBusinessTime(workflowInstance.getCmdTypeIfComplement(),
                         workflowInstance.getScheduleTime(), timezone);
-        String userDefinedParams = workflowInstance.getGlobalParams();
+
         // global params
-        List<Property> globalParams = new ArrayList<>();
-
-        // global param string
-        String globalParamStr =
-                ParameterUtils.convertParameterPlaceholders(GlobalParameterUtils.serializeGlobalParameter(globalParams),
-                        timeParams);
-        globalParams = GlobalParameterUtils.deserializeGlobalParameter(globalParamStr);
-        for (Property property : globalParams) {
-            timeParams.put(property.getProp(), property.getValue());
-        }
+        String globalParamsJson = workflowInstance.getGlobalParams();
+        List<Property> finalGlobalParams = new ArrayList<>();
+
+        if (StringUtils.isNotEmpty(globalParamsJson)) {
+            String replacedJsonStr = ParameterUtils.convertParameterPlaceholders(globalParamsJson, timeParams);
+            finalGlobalParams = GlobalParameterUtils.deserializeGlobalParameter(replacedJsonStr);
 
-        if (userDefinedParams != null && userDefinedParams.length() > 0) {
-            globalParams = GlobalParameterUtils.deserializeGlobalParameter(userDefinedParams);
+            if (finalGlobalParams != null) {
+                for (Property property : finalGlobalParams) {
+                    if (property.getProp() != null && property.getValue() != null) {
+                        timeParams.put(property.getProp(), property.getValue());
+                    }
+                }
+            }
         }
 
         Map<String, Map<String, Object>> localUserDefParams = getLocalParams(workflowInstance, timeParams);
 
         Map<String, Object> resultMap = new HashMap<>();
 
-        resultMap.put(GLOBAL_PARAMS, globalParams);
+        resultMap.put(GLOBAL_PARAMS, finalGlobalParams);
         resultMap.put(LOCAL_PARAMS, localUserDefParams);
 
         result.put(DATA_LIST, resultMap);
diff --git a/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/WorkflowInstanceServiceTest.java b/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/WorkflowInstanceServiceTest.java
index 592231fffc57..45c0c9b3ac2a 100644
--- a/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/WorkflowInstanceServiceTest.java
+++ b/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/WorkflowInstanceServiceTest.java
@@ -81,6 +81,7 @@
 import java.io.IOException;
 import java.text.MessageFormat;
 import java.util.ArrayList;
+import java.util.Calendar;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
@@ -790,6 +791,89 @@ public void testViewVariables() {
         Assertions.assertEquals(Status.WORKFLOW_INSTANCE_NOT_EXIST, processNotExist.get(Constants.STATUS));
     }
 
+    @Test
+    public void testViewVariables_WithTimePlaceholders() {
+        String globalParamsJson = "[{\"prop\":\"biz_date\",\"value\":\"$[yyyyMMdd]\",\"type\":\"VARCHAR\"}," +
+                "{\"prop\":\"env\",\"value\":\"${ENV_TYPE}\",\"type\":\"VARCHAR\"}]";
+
+        WorkflowInstance workflowInstance = getProcessInstance();
+        workflowInstance.setId(1);
+        workflowInstance.setCommandType(CommandType.SCHEDULER);
+
+        Calendar calendar = Calendar.getInstance();
+        calendar.set(2026, Calendar.MARCH, 13, 10, 0, 0);
+        workflowInstance.setScheduleTime(calendar.getTime());
+        workflowInstance.setGlobalParams(globalParamsJson);
+        workflowInstance.setWorkflowDefinitionCode(100L);
+
+        when(workflowInstanceMapper.queryDetailById(1)).thenReturn(workflowInstance);
+
+        WorkflowDefinition workflowDefinition = new WorkflowDefinition();
+        workflowDefinition.setCode(100L);
+        workflowDefinition.setProjectCode(1L);
+        when(workflowDefinitionMapper.queryByCode(100L)).thenReturn(workflowDefinition);
+
+        Map<String, Object> result = workflowInstanceService.viewVariables(1L, 1);
+
+        Assertions.assertEquals(Status.SUCCESS, result.get(Constants.STATUS));
+
+        Map<String, Object> dataList = (Map<String, Object>) result.get(Constants.DATA_LIST);
+        Assertions.assertNotNull(dataList);
+
+        List<Property> globalParams = (List<Property>) dataList.get(Constants.GLOBAL_PARAMS);
+        Assertions.assertNotNull(globalParams);
+        Assertions.assertEquals(2, globalParams.size());
+
+        Property dateParam = globalParams.stream()
+                .filter(p -> "biz_date".equals(p.getProp()))
+                .findFirst()
+                .orElse(null);
+        Assertions.assertNotNull(dateParam);
+        Assertions.assertEquals("20260313", dateParam.getValue(),
+                "Time placeholder $[yyyyMMdd] should be replaced with schedule time");
+
+        Property envParam = globalParams.stream()
+                .filter(p -> "env".equals(p.getProp()))
+                .findFirst()
+                .orElse(null);
+        Assertions.assertNotNull(envParam);
+    }
+
+    @Test
+    public void testViewVariables_InstanceNotFound() {
+        when(workflowInstanceMapper.queryDetailById(999)).thenReturn(null);
+
+        Map<String, Object> result = workflowInstanceService.viewVariables(1L, 999);
+
+        Assertions.assertEquals(Status.WORKFLOW_INSTANCE_NOT_EXIST, result.get(Constants.STATUS));
+        Assertions.assertNull(result.get(Constants.DATA_LIST));
+    }
+
+    @Test
+    public void testViewVariables_EmptyGlobalParams() {
+        WorkflowInstance workflowInstance = getProcessInstance();
+        workflowInstance.setId(2);
+        workflowInstance.setCommandType(CommandType.START_PROCESS);
+        workflowInstance.setScheduleTime(new Date());
+        workflowInstance.setGlobalParams("");
+        workflowInstance.setWorkflowDefinitionCode(101L);
+
+        when(workflowInstanceMapper.queryDetailById(2)).thenReturn(workflowInstance);
+
+        WorkflowDefinition workflowDefinition = new WorkflowDefinition();
+        workflowDefinition.setCode(101L);
+        workflowDefinition.setProjectCode(1L);
+        when(workflowDefinitionMapper.queryByCode(101L)).thenReturn(workflowDefinition);
+
+        Map<String, Object> result = workflowInstanceService.viewVariables(1L, 2);
+
+        Assertions.assertEquals(Status.SUCCESS, result.get(Constants.STATUS));
+
+        Map<String, Object> dataList = (Map<String, Object>) result.get(Constants.DATA_LIST);
+        List<Property> globalParams = (List<Property>) dataList.get(Constants.GLOBAL_PARAMS);
+        Assertions.assertTrue(globalParams.isEmpty(), "Global params list should be empty when input is empty string");
+    }
+
     @Test
     public void testViewGantt() throws Exception {
         WorkflowInstance workflowInstance = getProcessInstance();