Based on low efficiency, the start not smooth, overloading start difficult of traditional driving system, Changheng Coking Company combined with the actual situation, permanent magnet synchronous motor direct drive belt conveyor system was adopted. Compared with the traditional system, the new system got rid of reducer, hydraulic coupler, synchronizer gear and others, not only achieved the aim of high efficiency, energy saving, stable starting and constant torque control, with advantages of low noise and convenient control, got good effect.