Abstract: According to the basic requirements of CBM (coal bed methane) drainage control system, the establishment of conventional PID control model has some difficulties; ground CBM intelligent drainage control method based on PLC fuzzy control avoids the difficulties brought by the establishment of the model. This method is based on the gas concentration, temperature, pressure, flow and other parameters in drainage pipe to establish a control strategy to adjust the valve opening of drainage pipe at different concentrations of system parameters through the use of programmable logic controller (PLC), to adjust CBM flow and achieve the intelligent control of ground gas drainage pumping station on coal bed methane extraction and solve the deficiencies of gas extraction manual control and semi-automatic control. By laboratory simulation experiments, the feasibility and practicability of this method is verified.