Deep hole shot blasting device

The utility model provides a deep hole shot blasting device which comprises a spray gun, a plug and a reflecting plate, a main runner and a secondary runner are arranged in the spray gun, the plug is filled at one end of the main runner, the other end of the main runner is communicated with a shot flow source, one end of the secondary runner is communicated with the main runner, and the other end of the secondary runner is aligned to one side of the reflecting plate. And the other side of the reflecting plate is fixedly connected with the plug. According to the technical scheme, the pellet flow is sprayed to the surface of the reflecting plate through the main runner and the secondary runner in sequence, is sprayed towards the rear part of the spray gun under the reflecting action of the reflecting plate, and is finally sprayed and attached to the surface, back to the spray gun, of the inner wall of the deep hole, so that the pellet flow is uniformly sprayed and attached to each part of the inner wall of the