diff --git a/docker/.env.example b/docker/.env.example
index a024566c8f..3e12ef1271 100644
--- a/docker/.env.example
+++ b/docker/.env.example
@@ -799,6 +799,10 @@ HTTP_REQUEST_NODE_MAX_BINARY_SIZE=10485760
 HTTP_REQUEST_NODE_MAX_TEXT_SIZE=1048576
 HTTP_REQUEST_NODE_SSL_VERIFY=True
 
+# LLM node thinking tags preservation (default: true)
+# Set to false to remove <think></think> tags from reasoning models like DeepSeek-R1, Qwen
+LLM_NODE_THINKING_TAGS_ENABLED=true
+
 # Respect X-* headers to redirect clients
 RESPECT_XFORWARD_HEADERS_ENABLED=false
 
diff --git a/docker/docker-compose.yaml b/docker/docker-compose.yaml
index 7f91fd8796..03a49d213d 100644
--- a/docker/docker-compose.yaml
+++ b/docker/docker-compose.yaml
@@ -353,13 +353,14 @@ x-shared-env: &shared-api-worker-env
   WORKFLOW_PARALLEL_DEPTH_LIMIT: ${WORKFLOW_PARALLEL_DEPTH_LIMIT:-3}
   WORKFLOW_FILE_UPLOAD_LIMIT: ${WORKFLOW_FILE_UPLOAD_LIMIT:-10}
   WORKFLOW_NODE_EXECUTION_STORAGE: ${WORKFLOW_NODE_EXECUTION_STORAGE:-rdbms}
+  LLM_NODE_THINKING_TAGS_ENABLED: ${LLM_NODE_THINKING_TAGS_ENABLED:-true}
   HTTP_REQUEST_NODE_MAX_BINARY_SIZE: ${HTTP_REQUEST_NODE_MAX_BINARY_SIZE:-10485760}
   HTTP_REQUEST_NODE_MAX_TEXT_SIZE: ${HTTP_REQUEST_NODE_MAX_TEXT_SIZE:-1048576}
   HTTP_REQUEST_NODE_SSL_VERIFY: ${HTTP_REQUEST_NODE_SSL_VERIFY:-True}
   RESPECT_XFORWARD_HEADERS_ENABLED: ${RESPECT_XFORWARD_HEADERS_ENABLED:-false}
   SSRF_PROXY_HTTP_URL: ${SSRF_PROXY_HTTP_URL:-http://ssrf_proxy:3128}
   SSRF_PROXY_HTTPS_URL: ${SSRF_PROXY_HTTPS_URL:-http://ssrf_proxy:3128}
-  LOOP_NODE_MAX_COUNT: ${LOOP_NODE_MAX_COUNT:-100}
+  LOOP_NODE_MAX_COUNT: ${LOOP_NODE_MAX_COUNT:-100}  
   MAX_TOOLS_NUM: ${MAX_TOOLS_NUM:-10}
   MAX_PARALLEL_LIMIT: ${MAX_PARALLEL_LIMIT:-10}
   MAX_ITERATIONS_NUM: ${MAX_ITERATIONS_NUM:-99}