diff --git a/agent/knowledge/service.py b/agent/knowledge/service.py
index d78ff112..77ed7171 100644
--- a/agent/knowledge/service.py
+++ b/agent/knowledge/service.py
@@ -35,7 +35,7 @@ class KnowledgeService:
     IMPORT_EXTENSIONS = {".md", ".txt"}
     MAX_IMPORT_FILES = 100
     MAX_IMPORT_FILE_SIZE = 10 * 1024 * 1024
-    MAX_IMPORT_TOTAL_SIZE = 50 * 1024 * 1024
+    MAX_IMPORT_TOTAL_SIZE = 200 * 1024 * 1024
 
     def __init__(self, workspace_root: str, memory_manager=None):
         self.workspace_root = os.path.abspath(workspace_root)
diff --git a/channel/web/static/js/console.js b/channel/web/static/js/console.js
index cf8a93ef..d14bc531 100644
--- a/channel/web/static/js/console.js
+++ b/channel/web/static/js/console.js
@@ -7547,7 +7547,7 @@ let _knowledgeCurrentFile = null;
 let _knowledgeGraphLoaded = false;
 const KNOWLEDGE_IMPORT_MAX_FILES = 100;
 const KNOWLEDGE_IMPORT_MAX_FILE_SIZE = 10 * 1024 * 1024;
-const KNOWLEDGE_IMPORT_MAX_TOTAL_SIZE = 50 * 1024 * 1024;
+const KNOWLEDGE_IMPORT_MAX_TOTAL_SIZE = 200 * 1024 * 1024;
 
 function loadKnowledgeView() {
     // Reset to docs tab
@@ -7959,7 +7959,7 @@ function validateKnowledgeImportFiles(files) {
         }
     }
     if (total > KNOWLEDGE_IMPORT_MAX_TOTAL_SIZE) {
-        return currentLang === 'zh' ? '单次导入总大小不能超过 50MB' : 'Total import size cannot exceed 50MB';
+        return currentLang === 'zh' ? '单次导入总大小不能超过 200MB' : 'Total import size cannot exceed 200MB';
     }
     return '';
 }
diff --git a/tests/test_knowledge_service.py b/tests/test_knowledge_service.py
index d1bc9a94..57408167 100644
--- a/tests/test_knowledge_service.py
+++ b/tests/test_knowledge_service.py
@@ -280,6 +280,7 @@ def test_import_documents_skip_overwrite_and_failures(tmp_path):
 def test_import_documents_rejects_large_files_and_batches(tmp_path):
     svc, manager = service(tmp_path)
     (tmp_path / "knowledge/notes").mkdir()
+    assert svc.MAX_IMPORT_TOTAL_SIZE == 200 * 1024 * 1024
 
     too_large = svc.dispatch("import_documents", {
         "target_category": "notes",
diff --git a/tests/test_knowledge_web.py b/tests/test_knowledge_web.py
index 3dd26092..6ab2dba2 100644
--- a/tests/test_knowledge_web.py
+++ b/tests/test_knowledge_web.py
@@ -114,6 +114,7 @@ def test_knowledge_import_handler_delegates_to_dispatch(tmp_path):
 def test_knowledge_import_handler_rejects_large_content_length(tmp_path):
     from channel.web.web_channel import KnowledgeImportHandler
     from agent.knowledge.service import KnowledgeService
+    assert KnowledgeService.MAX_IMPORT_TOTAL_SIZE == 200 * 1024 * 1024
 
     with patch("channel.web.web_channel._require_auth"), \
          patch("channel.web.web_channel.web.header"), \