Abstract: In order to meet the demand of drilling accident of ZDY6000LD(A) mine-used crawler full hydraulic tunnel drilling rig, the 12 000 N·m high power fishing power head is designed. Considering the complexity of the drill force, the key parts are analyzed by finite element method, and the force under the actual condition of the rig is simulated, which plays a guiding role in the optimization design before processing. The test prototype is applied to the drilling accident treatment, and the reliability and practicability of the product is verified.