diff --git a/LTEMvcApp/Controllers/WebSocketController.cs b/LTEMvcApp/Controllers/WebSocketController.cs
index 01d2a88..8cc1752 100644
--- a/LTEMvcApp/Controllers/WebSocketController.cs
+++ b/LTEMvcApp/Controllers/WebSocketController.cs
@@ -460,7 +460,12 @@ namespace LTEMvcApp.Controllers
                 var json = Newtonsoft.Json.JsonConvert.SerializeObject(data);
                 var eventData = $"event: {eventName}\ndata: {json}\n\n";
                 
+                _logger.LogDebug("SendSseEvent: 发送事件 {EventName}, 数据长度: {DataLength}, 事件数据长度: {EventDataLength}", 
+                    eventName, json.Length, eventData.Length);
+                
                 await Response.WriteAsync(eventData);
+                
+                _logger.LogDebug("SendSseEvent: 事件 {EventName} 发送成功", eventName);
             }
             catch (Exception ex)
             {
@@ -706,13 +711,24 @@ namespace LTEMvcApp.Controllers
                         if (hasNewLogs && newLogs.Any())
                         {
                             _logger.LogInformation("StreamLogs: 发送新日志事件，新增日志数量: {NewCount}, 总日志数量: {TotalCount}", newLogs.Count, currentLogs.Count);
-                            await SendSseEvent("new_logs", new { 
+                            _logger.LogDebug("StreamLogs: 新日志详情 - 第一条: {FirstLog}, 最后一条: {LastLog}", 
+                                newLogs.FirstOrDefault()?.Message, 
+                                newLogs.LastOrDefault()?.Message);
+                            
+                            var eventData = new { 
                                 logs = newLogs, 
                                 totalCount = currentLogs.Count,
                                 newCount = newLogs.Count 
-                            });
+                            };
+                            
+                            _logger.LogDebug("StreamLogs: 准备发送事件数据: {EventData}", 
+                                Newtonsoft.Json.JsonConvert.SerializeObject(eventData));
+                            
+                            await SendSseEvent("new_logs", eventData);
                             await Response.Body.FlushAsync(cancellationToken);
                             
+                            _logger.LogInformation("StreamLogs: 新日志事件发送完成");
+                            
                             // 更新索引和缓存
                             lastLogCount = currentLogs.Count;
                             lastLogs = currentLogs.ToList();
@@ -1052,6 +1068,41 @@ namespace LTEMvcApp.Controllers
                 return StatusCode(500, new { message = "获取调试信息失败", error = ex.Message });
             }
         }
+
+        /// <summary>
+        /// 获取SSE连接状态（调试用）
+        /// </summary>
+        /// <returns>连接状态信息</returns>
+        [HttpGet("logs/connection-status")]
+        public ActionResult<object> GetSseConnectionStatus()
+        {
+            try
+            {
+                var status = new
+                {
+                    timestamp = DateTime.UtcNow,
+                    requestHeaders = Request.Headers.ToDictionary(h => h.Key, h => h.Value.ToString()),
+                    userAgent = Request.Headers["User-Agent"].ToString(),
+                    accept = Request.Headers["Accept"].ToString(),
+                    cacheControl = Request.Headers["Cache-Control"].ToString(),
+                    connection = Request.Headers["Connection"].ToString(),
+                    isHttps = Request.IsHttps,
+                    host = Request.Host.ToString(),
+                    path = Request.Path.ToString(),
+                    queryString = Request.QueryString.ToString(),
+                    method = Request.Method,
+                    contentType = Request.ContentType,
+                    contentLength = Request.ContentLength
+                };
+                
+                return Ok(status);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "获取SSE连接状态时发生错误");
+                return StatusCode(500, new { message = "获取连接状态失败", error = ex.Message });
+            }
+        }
     }
 
     /// <summary>
diff --git a/LTEMvcApp/Views/Home/Logs.cshtml b/LTEMvcApp/Views/Home/Logs.cshtml
index e4bca63..a6f2ca7 100644
--- a/LTEMvcApp/Views/Home/Logs.cshtml
+++ b/LTEMvcApp/Views/Home/Logs.cshtml
@@ -538,6 +538,7 @@
                                         <button class="btn-small" id="add-test-data-btn" title="添加测试数据">测试</button>
                                         <button class="btn-small" id="reconnect-btn" title="重新连接">重连</button>
                                         <button class="btn-small" id="debug-btn" title="调试信息">调试</button>
+                                        <button class="btn-small" id="test-connection-btn" title="测试连接">测试连接</button>
                                         <div class="column-settings">
                                             <button class="btn-small" id="column-settings-btn" title="列设置">列设置</button>
                                             <div class="column-settings-dropdown" id="column-settings-dropdown">
@@ -622,6 +623,7 @@
         const addTestDataBtn = document.getElementById('add-test-data-btn');
         const reconnectBtn = document.getElementById('reconnect-btn');
         const debugBtn = document.getElementById('debug-btn');
+        const testConnectionBtn = document.getElementById('test-connection-btn');
         const logListPanel = document.querySelector('.log-list-panel');
         const resizer = document.getElementById('drag-resizer');
         const layerFilterOptions = document.getElementById('layer-filter-options');
@@ -1072,6 +1074,12 @@
             
             eventSource = new EventSource('/api/websocket/logs/stream');
 
+            // 添加连接打开事件监听
+            eventSource.onopen = function(event) {
+                console.log('EventSource onopen 事件:', event);
+                updateConnectionStatus('connected', '已连接');
+            };
+
             eventSource.addEventListener('connected', function(event) {
                 console.log("SSE连接已建立", event);
                 updateConnectionStatus('connected', '已连接');
@@ -1081,6 +1089,7 @@
 
             eventSource.addEventListener('history', function(event) {
                 console.log("接收到历史日志事件", event);
+                console.log("历史日志原始数据:", event.data);
                 try {
                     const data = JSON.parse(event.data);
                     console.log("历史日志数据:", data);
@@ -1093,12 +1102,14 @@
                     }
                 } catch (error) {
                     console.error("解析历史日志数据失败:", error);
+                    console.error("原始数据:", event.data);
                     showError("解析历史日志数据失败: " + error.message);
                 }
             });
 
             eventSource.addEventListener('new_logs', function(event) {
                 console.log("接收到新日志事件", event);
+                console.log("新日志原始数据:", event.data);
                 try {
                     const data = JSON.parse(event.data);
                     console.log("新日志数据:", data);
@@ -1110,6 +1121,7 @@
                     }
                 } catch (error) {
                     console.error("解析新日志数据失败:", error);
+                    console.error("原始数据:", event.data);
                     showError("解析新日志数据失败: " + error.message);
                 }
             });
@@ -1158,6 +1170,7 @@
 
             eventSource.onerror = function (err) {
                 console.error("SSE 连接错误:", err);
+                console.error("EventSource readyState:", eventSource.readyState);
                 updateConnectionStatus('error', '连接失败');
                 
                 // 自动重连
@@ -1272,10 +1285,12 @@
                 sortField: sortField,
                 sortDirection: sortDirection,
                 columnVisibility: columnVisibility,
-                clusterizeRows: clusterize.rows.length
+                clusterizeRows: clusterize.rows.length,
+                url: window.location.href,
+                userAgent: navigator.userAgent
             };
             
-            console.log('调试信息:', debugInfo);
+            console.log('前端调试信息:', debugInfo);
             
             // 检查服务器端日志缓存状态
             fetch('/api/websocket/logs/debug')
@@ -1288,6 +1303,30 @@
                     console.error('获取服务器调试信息失败:', error);
                     showError('获取服务器调试信息失败: ' + error.message);
                 });
+                
+            // 检查SSE连接状态
+            fetch('/api/websocket/logs/connection-status')
+                .then(response => response.json())
+                .then(data => {
+                    console.log('SSE连接状态:', data);
+                })
+                .catch(error => {
+                    console.error('获取SSE连接状态失败:', error);
+                });
+        });
+
+        testConnectionBtn.addEventListener('click', function() {
+            // 测试连接
+            fetch('/api/websocket/logs/test-connection')
+                .then(response => response.json())
+                .then(data => {
+                    if (data.message) {
+                        showInfo(data.message);
+                    }
+                })
+                .catch(error => {
+                    showError('测试连接失败: ' + error.message);
+                });
         });
 
         // --- Resizer Logic ---