Sawing machine servo position control system module is controlled by sampling interpolation and foresee the position control of combining specific control (slightly), decided to close down the location of the feed oil cylinder, the feed cylinder stops just reached the target location. Due to the hysteresis of electromagnetic machinery and the inertia of motion, it is almost impossible to control the movement of feeding sliding platform by “on” and “off”. In order to ensure the minimum feeding length and feeding accuracy, the rear tongs make the feeding slide back to LK position and then move forward to the predicted position LT close the feeding electromagnetic valve. The tongs are clamped when the feed cylinder movement stops.