The invention discloses a driving belt debugging device for a belt conveyer. The driving belt debugging device for the belt conveyer a debugging mechanism, the debugging mechanism comprises a base plate, a side plate is arranged on the base plate, a driving motor is arranged on the side position of the side plate, a gear plate is arranged on the upper portion of the side plate, a driving shaft isarranged on the front portion of the driving motor, and a driving roller is mounted on the periphery surface of the driving shaft in a sleeving mode; an adjusting plate is arranged on the upper portion of the gear plate, a driven roller is arranged on the upper portion of the adjusting plate, a moving pipe is arranged on the front surface of the side plate, an adjusting pipe is arranged at the outer end of the moving pipe, traction rollers are arranged at the two ends of the adjusting pipe, and a belt is arranged among the traction rollers, the driving roller and the driven roller in a windingmode. The driving belt debugging device for the belt conveyer can conveniently perform tensioning adjustment on the belt, the driving motor controls the driving roller to rotate through the driving shaft, and thus the belt is driven to rotate, and flexible debugging is carried out on the belts conveniently.