Abstract: The cement mortar hole sealing and rubber seal water injection hole packer used in current coal mines has the disadvantages that efficiency of hole sealing is low, sealing material steel pipe can not be recyded, and pressure will subsequently discharge into drilling when water injection flow is small. Therefore, we propose self-locking pressure hole packer which adopts the method combined hole packer of dual channel structure with self-sealing muzzle of self-locking pressure type to make hole sealing pressure and hole sealing time controlled and ensure that the hole sealing effect; self-sealing muzzle ensures that hole sealing pressure does not leak, hole sealing can carry out for a long time to ensure water flooding effect. Rubber parts can be restorable after pressure relief; therefore, it can be reusable with fast speed hole sealing.