Mine belt conveyor drive motor soft start with hydraulic coupling, and there is a soft start equipment water resistance is easy to pollute the environment, the belt tension under, motor torque is difficult to balance the problem.Through the analysis of the speed regulation principle of frequency converter, frequency conversion technology was applied to the belt conveyer motor speed control system.Practice shows that by adopting master-slave high voltage variable frequency speed regulation system, belt conveyor start stable and reliable, to achieve the balance of the motor torque, and reduces the power consumption and prolong the service life of the belt, improves the economic benefit, for the similar speed regulation system of technical reform for reference.