Cooling device of pneumatic drilling machine

The utility model discloses a cooling device of a pneumatic drilling machine. The cooling device comprises a pneumatic jumbolter assembly and water circulation cooling assemblies arranged at the head end and the tail end of the pneumatic jumbolter assembly. The water circulation cooling assembly comprises a compressed air release tank, an air inlet valve and an air outlet valve which are arranged at the top end and the bottom end of the compressed air release tank, and a jacket wrapping the outer surface of the compressed air release tank. Based on the principle that air becomes hot after being compressed, after heat is released and the compression state is released, the process that the volume of the air recovers to the state before compression is an endothermic reaction, and then the surrounding temperature of the air can be reduced, the compressed air is released into the release tank, so that the compressed air is released into the release tank; the cooling agent in front of the jacket and the release tan