AS AN IMPORTANT APPLICATION IN THE FIELD OF ELECTRICAL AUTOMATION, PLC-BASED MOTION CONTROL SYSTEM HAS BEEN WIDELY USED IN PRODUCTION AND LIFE. Motion control mainly contains motion control has two kinds of inverter and servo, and its research is mainly started by motor motion and its drag device state. The Micro850 PLC supports motion control and offers some advantages in terms of variable frequency and servo control. The screw is an excellent product for back-and-forth swing and straight motion. The screw is generally used in precision machinery, has a higher precision, can turn the rotation movement into a straight line movement, is conducive to the improvement of production efficiency and pass rate. The function of the inverter is mainly to convert the frequency power supply into a different frequency of electrical control devices, mainly with the help of electric semiconductor devices. The market is currently used more for servo drivers, which are mainly used for the control of servo motors, which is part of the servo system, mainly similar to the inverter. The function of controlling the drive and the servo driver can be achieved by means of the touch screen input parameters and communication with the PLC.