Stone blocking drill bit suitable for rotary excavating of stone filling layer of cast-in-place pile

The utility model relates to the technical field of engineering machinery, and discloses a stone blocking drill bit suitable for rotary excavating of a filling pile stone filling layer, which comprises a drill barrel and a connector used for connecting a drill rod, the bottom of the connector is abutted against the top of the drill barrel from top to bottom, a stone blocking plate for receiving falling stone blocks is arranged on the top of the connector, and the stone blocking plate is horizontally arranged; a plurality of reinforcing rib plates which deviate from the connector and extend to the bottom edge of the stone baffle plate are arranged on the periphery of the connector; the drill barrel bears block stones falling from a stone filling layer of a pile hole through the stone blocking plate, the block stones are prevented from directly falling on the drill barrel, the drill barrel and the stone blocking plate are separated through the reinforcing rib plate, protection on the drill barrel is improved, t