diff --git a/apps/resm/filters.py b/apps/resm/filters.py
index 7eddc2f..70c8e86 100644
--- a/apps/resm/filters.py
+++ b/apps/resm/filters.py
@@ -7,11 +7,16 @@ class PaperFilterSet(filters.FilterSet):
     publication_year_gte = filters.NumberFilter(field_name="publication_year", lookup_expr="gte")
     publication_year_lte = filters.NumberFilter(field_name="publication_year", lookup_expr="lte")
 
+    # 发表日期范围(比 year 更细,支持 YYYY-MM-DD)
+    publication_date_gte = filters.DateFilter(field_name="publication_date", lookup_expr="gte")
+    publication_date_lte = filters.DateFilter(field_name="publication_date", lookup_expr="lte")
+
     class Meta:
         model = Paper
         fields = [
             # 原有
             "publication_year",
+            "publication_date",   # 精确日期 YYYY-MM-DD
             "type",
             "fetch_status",
             "has_abstract",