The utility model provides a driving device of a belt conveyer, which comprises a motor, a clutch, a clutch actuating mechanism, a speed changer, a gear selection and shift actuating mechanism, and anelectronic control unit. The motor is connected with the input end of the speed changer through the clutch. The clutch is connected with the clutch actuating mechanism. The speed changer is connectedwith the gear selection and shift actuating mechanism. The gear selection and shift actuating mechanism is connected with a gear shift logic controller. A synchronizer is arranged in the speed changer which is provided with a gear sensor. A current sensor is installed in the motor. A belt speed sensor is arranged on the conveyer belt of the belt conveyer. The clutch actuating mechanism, the gearselection and shift actuating mechanism, the current sensor, the gear sensor and the belt speed sensor are all electrically connected with the electronic control unit. The driving device has simple structure and high driving efficiency, is convenient to be maintained, and greatly reduces cost.