Abstract: The vibration energy generated by the rocker arm of shearer can be converted into electrical energy to power the wireless sensor node through energy collection technology, but the current common piezoelectric power generation device has high natural frequency and low output power. In order to improve the efficiency of vibration energy collection of shearer rocker arm, the typical cantilever piezoelectric power generation device was modeled and analyzed, and the parameters affecting the output voltage and power were found. A multilayer arrangement piezoelectric structure was designed, and the COMSOL software was used for simulation verification. The results show that the natural frequency can be reduced by changing the length and mass of the cantilever beam, and the resonant points in the frequency range below 625Hz are increased to 4, and the output voltage and output power of the piezoelectric power generation device are increased by 65% and 172.4% respectively under the same external conditions.