Automatic screw fastening machine is mainly composed of screw automatic conveying system, x-y-z movement platform, control system and fastening system. The work efficiency is much higher than the traditional manual work.Automatic robot screw tightening machine is with various types: single platform, double platform, dual screw feeding systems, double screw feeder with blowing and pneumatic mode to meet different product requirements. Screw locking feeder machine is programmed by teaching pendant for easy operation with detection functions as leak lock,sliding teeth,floating lock and so on. Robot locking screw machine is applied to M1-M10 screws, mainly applicable for socket, switch, LED, valve, toy, automobile, household appliances, 3C industry etc.