The coal mining shearer is one of the important equipment for the coal mining machinery. The working environment is rather poor and if it fails, it will cause huge economic losses. The height-adjusting mechanism is the main component of coal mining shearer and is a key technology for realizing the lifting and lowering of the rocker arm. It plays a significant role in the coal mining work. The height adjustment of the shearer is an important component of the height adjustment mechanism of the shearer. The working performance of the shearer directly affects the working efficiency of the shearer and the reliability of the equipment operation.