diff --git a/spider-flow-web/src/main/java/org/spiderflow/controller/SpiderFlowController.java b/spider-flow-web/src/main/java/org/spiderflow/controller/SpiderFlowController.java
index 2c60f69..a550d63 100644
--- a/spider-flow-web/src/main/java/org/spiderflow/controller/SpiderFlowController.java
+++ b/spider-flow-web/src/main/java/org/spiderflow/controller/SpiderFlowController.java
@@ -3,6 +3,7 @@ package org.spiderflow.controller;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.math.NumberUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.spiderflow.Grammerable;
@@ -164,7 +165,7 @@ public class SpiderFlowController {
 
 	@RequestMapping("/log/download")
 	public ResponseEntity<FileSystemResource> download(String id, String taskId)  {
-		if (StringUtils.isBlank(taskId)) {
+		if (StringUtils.isBlank(taskId) || NumberUtils.toInt(taskId,0) == 0) {
 			Integer maxId = spiderFlowService.getFlowMaxTaskId(id);
 			taskId = maxId == null ? "" : maxId.toString();
 		}
diff --git a/spider-flow-web/src/main/resources/static/log.html b/spider-flow-web/src/main/resources/static/log.html
index d8a4fd8..fe89d31 100644
--- a/spider-flow-web/src/main/resources/static/log.html
+++ b/spider-flow-web/src/main/resources/static/log.html
@@ -243,7 +243,7 @@
                 viewer.setOptions('reversed',true);
                 viewer.init();
             }).on('click','.btn-download',function(){
-                window.open('spider/log/download?id=' + logId + "&taskId=" + taskId);
+                window.open('spider/log/download?id=' + logId + "&taskId=" + (taskId || ''));
             });
 		});
 	</script>