In order to ensure operator safety and equipment safety, a kind of safety integration function for double channel CNC machine tool was developed. Double-side planer type milling and boring machine with this function can monitor the security fence lock and security door closing state of each control channel in real time through PMC hardware and program, and safety locks’ opening and closing of each channel are controlled globally. While any door opening command or unclosed state is detected, the NC program enabling of each channel can be interlocked, and the velocity of all feed shafts and spindles are limited to avoid safety accidents as far as possible, better guarantee operator’s safety and improve the practicability of the machine.