diff --git a/fe/fe-core/src/main/java/org/apache/doris/planner/PartitionPrunerV2Base.java b/fe/fe-core/src/main/java/org/apache/doris/planner/PartitionPrunerV2Base.java
index 1d9f163ca804e4..6b34f037411e20 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/planner/PartitionPrunerV2Base.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/planner/PartitionPrunerV2Base.java
@@ -108,7 +108,7 @@ public PartitionPrunerV2Base(Map<Long, PartitionItem> idToPartitionItem,
     public Collection<Long> prune() throws AnalysisException {
         Map<Column, FinalFilters> columnToFilters = Maps.newHashMap();
         for (Column column : partitionColumns) {
-            ColumnRange columnRange = columnNameToRange.get(column.getName());
+            ColumnRange columnRange = columnNameToRange.get(column.getName().toLowerCase());
             if (columnRange == null) {
                 columnToFilters.put(column, FinalFilters.noFilters());
             } else {