diff --git a/backend/tests/test_deploy_script.py b/backend/tests/test_deploy_script.py
index a179f475..77dcc803 100644
--- a/backend/tests/test_deploy_script.py
+++ b/backend/tests/test_deploy_script.py
@@ -701,6 +701,35 @@ def test_an_unlabelled_container_is_recognised_by_its_password_mount(tmp_path):
     assert PG in a.containers() and "没有删它" in out.stderr
 
 
+def test_uninstall_removes_only_its_own_network(tmp_path):
+    """复核 R-d3：网络带着部署编号的标签，卸载时只删自己建的；早先建的没标签，按数据目录里记着的网络名认。"""
+    a = Deploy(tmp_path / "a")
+    a("install", "--postgres")
+    dep = a.state_values()["id"]
+    assert a.state()["networks"][NET] == {"agentlab.role": "network", "agentlab.deployment": dep}
+    # 别人建的、名字正好一样的网络（没有这个部署的标签）：不删
+    state = a.state()
+    state["networks"][NET] = {"agentlab.role": "network", "agentlab.deployment": "someone-else"}
+    a.state_file.write_text(json.dumps(state))
+    out = a("uninstall")
+    assert NET in a.state()["networks"] and "不是这个部署建的" in out.stdout
+    # 早先建的、没标签的：数据目录里记着这个名字就是自己的
+    state = a.state()
+    state["networks"][NET] = {}
+    a.state_file.write_text(json.dumps(state))
+    a("install")
+    a("uninstall")
+    assert NET not in a.state()["networks"]
+    # 没标签、数据目录里也没记着的（比如这是个 SQLite 部署，同名网络是别人的）：不删
+    b = Deploy(tmp_path / "b", name="agl-b", share=a)
+    b("install")
+    state = b.state()
+    state["networks"]["agl-b-net"] = {}
+    b.state_file.write_text(json.dumps(state))
+    b("uninstall")
+    assert "agl-b-net" in b.state()["networks"]
+
+
 def test_upgrade_with_a_new_image_does_not_recreate_another_deployments_container(tmp_path):
     a = Deploy(tmp_path / "a")
     a("install", "--postgres")
diff --git a/deploy/deploy.sh b/deploy/deploy.sh
index 41d4497d..dd0cd98a 100755
--- a/deploy/deploy.sh
+++ b/deploy/deploy.sh
@@ -766,7 +766,19 @@ ensure_pg_image() {
 ensure_network() {
   docker network inspect "$DOCKER_NETWORK" >/dev/null 2>&1 && return 0
   say "创建 docker 网络 ${DOCKER_NETWORK}（PostgreSQL 只在这个网络里可见，端口不对外）"
-  docker network create "$DOCKER_NETWORK" >/dev/null
+  docker network create --label agentlab.role=network --label "agentlab.deployment=$DEPLOY_ID" "$DOCKER_NETWORK" >/dev/null
+}
+
+# 网络是不是这个部署建的：标签和部署编号对得上；早先建的没有标签，按数据目录里记着的网络名认
+network_is_ours() {
+  local role dep
+  role="$(docker network inspect -f '{{index .Labels "agentlab.role"}}' "$DOCKER_NETWORK" 2>/dev/null || true)"
+  dep="$(docker network inspect -f '{{index .Labels "agentlab.deployment"}}' "$DOCKER_NETWORK" 2>/dev/null || true)"
+  if [ -n "$role$dep" ]; then
+    [ "$role" = network ] && [ -n "$DEPLOY_ID" ] && [ "$dep" = "$DEPLOY_ID" ]
+  else
+    [ -n "$DATA_ABS" ] && [ "$(state_value network)" = "$DOCKER_NETWORK" ]
+  fi
 }
 
 pg_secrets() {
@@ -1271,8 +1283,12 @@ cmd_uninstall() {
     fi
   fi
   if docker network inspect "$DOCKER_NETWORK" >/dev/null 2>&1; then
-    docker network rm "$DOCKER_NETWORK" >/dev/null 2>&1 && say "删除 docker 网络 $DOCKER_NETWORK" \
-      || warn "docker 网络 $DOCKER_NETWORK 没删掉（可能还有别的容器连着）"
+    if network_is_ours; then
+      docker network rm "$DOCKER_NETWORK" >/dev/null 2>&1 && say "删除 docker 网络 $DOCKER_NETWORK" \
+        || warn "docker 网络 $DOCKER_NETWORK 没删掉（可能还有别的容器连着）"
+    else
+      echo "docker 网络 $DOCKER_NETWORK 不是这个部署建的（没有这个部署的标签，数据目录里也没记着它），没有删"
+    fi
   fi
   if [ -n "$PURGE_IMAGE" ]; then
     if image_present; then