diff --git a/services/aams/src/accessibility_screen_touch.cpp b/services/aams/src/accessibility_screen_touch.cpp
index 3276c467..e2f5260f 100644
--- a/services/aams/src/accessibility_screen_touch.cpp
+++ b/services/aams/src/accessibility_screen_touch.cpp
@@ -236,6 +236,11 @@ void AccessibilityScreenTouch::HandleCoordinates(MMI::PointerEvent::PointerItem
             startAngle_ = START_ANGLE_PORTRAIT;
             break;
         case FOLDABLE_DEVICE:
+            if (FOLDABLE.length() < SUBSCRIPT_TWO) {
+                HILOG_ERROR("get foldable parameter failed");
+                ConversionCoordinates(originalX, originalY);
+                break;
+            }
             if ((displayMgr.GetFoldStatus() == Rosen::FoldStatus::EXPAND &&
                 FOLDABLE[SUBSCRIPT_TWO] == FOLDABLE_SCREEN_ROTATE) ||
                 (displayMgr.GetFoldStatus() == Rosen::FoldStatus::FOLDED &&