Abstract: To solve the problem of poor reliability of the knitting machine,which results from the operating characteristics of its electrical control system including the strict logic sequence,severe interference of electromagnet,reliable grounding requirement and very long working time,a new design of anti-interference is put forward accordingly based on analyzing the types and origin of interference in the control system.In this design,the AC filter and TVS are used to reduce the power interference,and the photoelectric coupler,releasing-current diode and spark-extinguisher are added to prevent the electromagnets and relays from producing interference.FPGA/CPLD can guard the punctual operating time of all electromagnets.The right grounding system insures safe operation of knitting machine.The watchdog technology and reliable design concept improve the anti-interference ability of the control software.The above proposed methods are synthetically applied to the electrical control system of glove knitting machine,and the practical application indicates that good anti-interference result is achieved.