The invention discloses an efficient durable energy-saving numerical control screw press, and belongs to the field of mechanical industrial equipment. An upper transmission system is connected with a motor (1), a screw press (19) and a brake (10) respectively; and a control system is connected with the control ends of the motor (1) and the brake (10). The upper transmission system comprises a belt drive, a gear drive, a half gear box with fixing function, a transmission box, a belt tension adjusting device and a belt flatness adjusting device. The half gear box comprises a front half box (12) and a rear half box (13) which are fixed connected with each other. the increased belt drive is connected with the gear drive so as to effectively protect a motor shaft. The increased half gear box ensures the precision of the gear drive, and the increased adjusting device tensions the belt and increases the drive torque. An increased positioning screw is convenient to adjust the flatness of the belt. An increased gearwheel and pinion adjusting device can ensure high efficiency and durability.