Abstract: Abstract: In this paper, the shearer height adjustment system is impacted by external load when it is adjusted, and it is impossible to accurately control and adjust the flow rate, so that the high efficiency is low and the problem of the lifting process of the drum cannot be accurately controlled. For that, According to the target tracking performance, a kind of proposed Control strategy based on internal model (IMC) PID controller. Chose the MG750/1820 electric haulage shearer as an example, through the mechanical principle analysis and the displacement sensor transfer function analysis, the calculation and derivation of the control system structural model is carried out. The assumption condition analysis adopts the H2 optimal control method in the design of the IMC controller. Then according to the relationship between the internal model controller and the feedback controller, the optimal control result is a controller scheme with a PID of the filter. The controller design effect analysis is carried out, and the simulation results are analyzed by Matlab software to verify the effectiveness of the control strategy.