The present invention discloses a fully automatic LED mounting machine control system which comprises a host software system, a motion control system and a visual compensation system. The host software system comprises a man-machine interface module, a teaching programming module and a control call module. The host software system is connected to the motion control system and the visual compensation system through a CAN bus. The motion control system receives a control command and controls the motion of the motor which is connected to the motion of a motor which is connected to a motion controller, the feeding of a FeiDa feeder and the material adsorbing and discharging of the electromagnetic valve of a nozzle through a motor control module and an I/O output module, the motion control system returns a sensor signal to the host software system. The visual compensation system comprises a light source control module, a CCD module and an image processing module. According to the fully automatic LED mounting machine control system, the speed and precision of the chip mounting of an LED mounting machine are improved, the CAN communication is employed, the CAN communication has the advantages of high communication rate, short development period and easy realization, and the high speed and high precision control of an LED mounting machine system can be realized.