diff --git a/README_DOCKER.md b/README_DOCKER.md
index 9ac82da..dd5921e 100644
--- a/README_DOCKER.md
+++ b/README_DOCKER.md
@@ -140,6 +140,9 @@ bash scripts/migrate_container_db_to_volume.sh
 # 指定旧容器名
 SOURCE_CONTAINER=old-alphax-web bash scripts/migrate_container_db_to_volume.sh
 
+# 旧容器已经停止也可以复制主 DB（如果仍在运行，脚本会用更安全的 SQLite backup）
+ALLOW_STOPPED=1 SOURCE_CONTAINER=old-alphax-web bash scripts/migrate_container_db_to_volume.sh
+
 # 只复制，不自动重启 compose 服务
 RECREATE=0 bash scripts/migrate_container_db_to_volume.sh
 
@@ -147,6 +150,19 @@ RECREATE=0 bash scripts/migrate_container_db_to_volume.sh
 FORCE=1 bash scripts/migrate_container_db_to_volume.sh
 ```
 
+如果脚本提示找不到 `alphax-web`，先查看服务器上的真实容器名：
+
+```bash
+docker compose ps
+docker ps -a --format 'table {{.Names}}\t{{.Status}}\t{{.Image}}'
+```
+
+然后用真实容器名执行：
+
+```bash
+SOURCE_CONTAINER=<真实容器名> bash scripts/migrate_container_db_to_volume.sh
+```
+
 ## 打包迁移到新服务器
 
 建议只打包代码和配置骨架，不把 DB 直接打进镜像。可以用 tar 打包整个副本目录，排除本地缓存和归档备份：
diff --git a/scripts/migrate_container_db_to_volume.sh b/scripts/migrate_container_db_to_volume.sh
index 9409082..23c0092 100755
--- a/scripts/migrate_container_db_to_volume.sh
+++ b/scripts/migrate_container_db_to_volume.sh
@@ -17,6 +17,7 @@ set -euo pipefail
 #   SOURCE_CONTAINER=old-alphax-web bash scripts/migrate_container_db_to_volume.sh
 #   SERVICE=alphax-web TARGET_DB=data/altcoin_monitor.db bash scripts/migrate_container_db_to_volume.sh
 #   RECREATE=0 bash scripts/migrate_container_db_to_volume.sh
+#   ALLOW_STOPPED=1 SOURCE_CONTAINER=old-alphax-web bash scripts/migrate_container_db_to_volume.sh
 
 ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 cd "$ROOT_DIR"
@@ -31,6 +32,7 @@ BACKUP_DIR="${BACKUP_DIR:-data/backups}"
 RECREATE="${RECREATE:-1}"
 STOP_SCHEDULER="${STOP_SCHEDULER:-1}"
 FORCE="${FORCE:-0}"
+ALLOW_STOPPED="${ALLOW_STOPPED:-1}"
 
 compose() {
   ${COMPOSE_CMD} "$@"
@@ -49,6 +51,15 @@ service_exists() {
   compose config --services 2>/dev/null | grep -qx "$1"
 }
 
+container_running() {
+  local cid="$1"
+  [ "$(docker inspect -f '{{.State.Running}}' "$cid" 2>/dev/null || echo false)" = "true" ]
+}
+
+container_name_for_log() {
+  docker inspect -f '{{.Name}}' "$1" 2>/dev/null | sed 's#^/##'
+}
+
 container_id() {
   if [ -n "$SOURCE_CONTAINER" ]; then
     docker inspect -f '{{.Id}}' "$SOURCE_CONTAINER" >/dev/null 2>&1 || die "SOURCE_CONTAINER not found: $SOURCE_CONTAINER"
@@ -57,8 +68,30 @@ container_id() {
   fi
   local cid
   cid="$(compose ps -q "$SERVICE" 2>/dev/null || true)"
-  [ -n "$cid" ] || die "service '$SERVICE' is not running. Start it first, or set SOURCE_CONTAINER=<container_name>."
-  echo "$cid"
+  if [ -n "$cid" ]; then
+    echo "$cid"
+    return
+  fi
+
+  # Fallback for servers where the old container was not created by the current
+  # compose project, or the compose service name/project name changed.
+  for name in "$SERVICE" alphax-web alphax_web alphax; do
+    cid="$(docker ps -aq --filter "name=^/${name}$" | head -n 1)"
+    if [ -n "$cid" ]; then
+      echo "$cid"
+      return
+    fi
+  done
+
+  echo "ERROR: service '$SERVICE' is not running and no fallback container was found." >&2
+  echo "" >&2
+  echo "Run one of these on the server:" >&2
+  echo "  docker compose ps" >&2
+  echo "  docker ps -a --format 'table {{.Names}}\t{{.Status}}\t{{.Image}}'" >&2
+  echo "" >&2
+  echo "Then rerun with the actual container name, for example:" >&2
+  echo "  SOURCE_CONTAINER=<container_name> bash scripts/migrate_container_db_to_volume.sh" >&2
+  exit 1
 }
 
 is_source_db_under_mount() {
@@ -124,17 +157,27 @@ STAMP="$(date +%Y%m%d_%H%M%S)"
 TMP_IN_CONTAINER="/tmp/alphax_container_db_${STAMP}.db"
 TMP_ON_HOST="${BACKUP_DIR}/altcoin_monitor.from_container.${STAMP}.tmp.db"
 
-info "source container: ${SOURCE_CONTAINER:-$SERVICE} ($CID)"
+SOURCE_LABEL="${SOURCE_CONTAINER:-$(container_name_for_log "$CID")}"
+info "source container: ${SOURCE_LABEL:-$SERVICE} ($CID)"
 info "source db: $SOURCE_DB"
 info "target db: $TARGET_DB"
 
-docker exec -e SOURCE_DB="$SOURCE_DB" "$CID" sh -lc 'test -s "$SOURCE_DB"' \
-  || die "source database does not exist or is empty inside container: $SOURCE_DB"
+RUNNING=0
+if container_running "$CID"; then
+  RUNNING=1
+  docker exec -e SOURCE_DB="$SOURCE_DB" "$CID" sh -lc 'test -s "$SOURCE_DB"' \
+    || die "source database does not exist or is empty inside container: $SOURCE_DB"
 
-if is_source_db_under_mount "$CID" && [ "$FORCE" != "1" ]; then
-  info "container path '$SOURCE_DB' is already under a mounted volume/bind mount."
-  info "No migration needed. Set FORCE=1 only if you intentionally want to copy it anyway."
-  exit 0
+  if is_source_db_under_mount "$CID" && [ "$FORCE" != "1" ]; then
+    info "container path '$SOURCE_DB' is already under a mounted volume/bind mount."
+    info "No migration needed. Set FORCE=1 only if you intentionally want to copy it anyway."
+    exit 0
+  fi
+else
+  if [ "$ALLOW_STOPPED" != "1" ]; then
+    die "source container is stopped. Start it first, or set ALLOW_STOPPED=1 to docker cp the DB from the stopped container."
+  fi
+  info "source container is stopped; falling back to docker cp. SQLite WAL files cannot be checkpointed in this mode."
 fi
 
 mkdir -p "$(dirname "$TARGET_DB")" "$BACKUP_DIR"
@@ -144,11 +187,12 @@ if [ "$STOP_SCHEDULER" = "1" ] && service_exists "$SCHEDULER_SERVICE"; then
   compose stop "$SCHEDULER_SERVICE" >/dev/null 2>&1 || true
 fi
 
-info "creating SQLite backup inside container"
-docker exec \
-  -e SOURCE_DB="$SOURCE_DB" \
-  -e TMP_DB="$TMP_IN_CONTAINER" \
-  "$CID" python - <<'PY'
+if [ "$RUNNING" = "1" ]; then
+  info "creating SQLite backup inside running container"
+  docker exec \
+    -e SOURCE_DB="$SOURCE_DB" \
+    -e TMP_DB="$TMP_IN_CONTAINER" \
+    "$CID" python - <<'PY'
 import os
 import sqlite3
 
@@ -173,9 +217,19 @@ if result != "ok":
 print(f"backup_created={dst}")
 PY
 
-info "copying backup from container to host"
-docker cp "${CID}:${TMP_IN_CONTAINER}" "$TMP_ON_HOST"
-docker exec -e TMP_DB="$TMP_IN_CONTAINER" "$CID" sh -lc 'rm -f "$TMP_DB"' >/dev/null 2>&1 || true
+  info "copying backup from container to host"
+  docker cp "${CID}:${TMP_IN_CONTAINER}" "$TMP_ON_HOST"
+  docker exec -e TMP_DB="$TMP_IN_CONTAINER" "$CID" sh -lc 'rm -f "$TMP_DB"' >/dev/null 2>&1 || true
+else
+  info "copying raw DB from stopped container"
+  docker cp "${CID}:${SOURCE_DB}" "$TMP_ON_HOST" \
+    || die "failed to copy $SOURCE_DB from stopped container. Check SOURCE_DB path."
+  for suffix in "-wal" "-shm"; do
+    if docker cp "${CID}:${SOURCE_DB}${suffix}" "${TMP_ON_HOST}${suffix}" >/dev/null 2>&1; then
+      info "copied sidecar ${SOURCE_DB}${suffix}"
+    fi
+  done
+fi
 
 verify_db_on_host_if_possible "$TMP_ON_HOST"