diff --git a/lib/core/monitor.js b/lib/core/monitor.js
index 1529bbd..8c8044e 100644
--- a/lib/core/monitor.js
+++ b/lib/core/monitor.js
@@ -344,7 +344,7 @@ class Monitor extends Searcher {
                 needTopic = [...new Set(description.match(/(?<=[带加上](?:话题|tag).*)#.+?#|(?<=[带加上])#.+?#(?=话题|tag)/ig) || [])].join(' '),
                 isRelayDynamic = type === 1,
                 has_key_words = key_words.every(it => new RegExp(it).test(description)),
-                isBlock = new RegExp(blockword.join('|')).test(description + reserve_lottery_text),
+                isBlock = blockword.length && new RegExp(blockword.join('|')).test(description + reserve_lottery_text),
                 isLottery =
                     (is_imitator && lottery_info_type === 'uid' && model !== '00')
                     || (hasOfficialLottery && model[0] === '1')