The utility model belongs to electronic technology and computer realm especially relate to a motor servo control system based on industrial flat bed sewing machine, the utility model discloses becoming alternating current power supply into the direct current through exchanging the filter circuit rectification, providing the required power of motor operation and provide system's work required system power supply through switching power supply module, DC Brushless motor is driven by motor driver module, and the rotational speed of motor and rotor position sigual are by installing the acquisition at the epaxial photoelectric encoder of motor machine. The motor passes through mechanical transmission system and drives the eedle and make the back and forth movement, and whole servo's control circuit uses DSC as the core, and it can accomplish DC Brushless motor sensor signal's collection and processing, and the realization motor is worked and the stepless speed control under sinusoidal wave current drive mode to control other mechanism's cooperation motor actions and accomplish sewing work jointly, the utility model discloses simple structure can accomplish high -speed, the high -efficient and complicated sewing task of industrial flat bed sewing machine.