Abstract: To meet the real-time performance requirement of high speed loom′s control system,a loom distributed control system based on CAN-bus was presented.Through analyzing CAN-bus′s character and comparing with RS-485 bus,it confirmed the feasibility and superiority of application of the CAN bus on loom;In allusion to the communication real-time performance,it analyzed the inherent limitation of CAN protocol and the deficiencies in application layer protocol CANOpen,a network real-time optimized method was proposed,and the realizing process of protocol CANOpen and the architecture of rapier loom distributed control system were presented.The results of the control system running indicated that it had a low error rate of connunication and worked steadily.The system has some application value.