diff --git a/analyzers/daily_digest.py b/analyzers/daily_digest.py
index e511ed0..eccc15f 100644
--- a/analyzers/daily_digest.py
+++ b/analyzers/daily_digest.py
@@ -308,8 +308,22 @@ def run(memos_client, llm_client, date=None):
     user_tags = sorted(tag_freq.keys())
     all_tags = default_tags + user_tags
 
+    # Extract #知识 tagged memos for "今日新知" section
+    knowledge_items = [m for m in memos if "知识" in m.get("tags", [])]
+    knowledge_section = ""
+    if knowledge_items:
+        knowledge_lines = []
+        for m in knowledge_items:
+            time_bj = utc_to_beijing(m["created_at"])
+            content_clean = m["content"].strip()
+            knowledge_lines.append("- [%s] %s" % (time_bj, content_clean))
+        if knowledge_lines:
+            knowledge_section = "\n\n---\n\n### 今日新知\n\n你今天学到了以下新知识：\n\n" + "\n".join(knowledge_lines)
+        else:
+            knowledge_section = ""
+
     content = format_daily_digest(
-        date, ai_body=raw_response,
+        date, ai_body=raw_response + knowledge_section,
         tags=all_tags, doc_type="daily-digest"
     )