The present paper first introduced the YXA3132 gear-hobbing machine bed's electric control system's characteristic, then to the YXA3132 gear-hobbing machine bed's engine bed control work situation, the electrical system, electrical operation showing has carried on the concrete study including some protective system and the part active channel. Has conducted system's analytical study in the paper to the traditional relay - contact device electric control system, proposed the good transformation plan. Through applies the programmable controller (PLC) the control system to complete the relay and so on control function, realizes the control simplicity, operation convenient. This improvement program elaborates from control system's hardware design and the software design two aspects. In the hardware design aspect, to the original relay's replace, the PLC choice and the PLC control system's wiring design has given the detailed explanation; In the software design aspect, according to programming's request from the YXA3132 gear-hobbing machine bed's work requirement, the sequence of operation, design proposal's contrast, the trapezoidal chart, the directive statement table and so on different aspect carries on the explanation. Finally has carried on the simple elaboration to the PLC control system design's disturbance question and the main antijamming question. Through to the entire YXA3132 gear-hobbing machine bed's electric control system's improvement, in the existing enterprise is the very realistic technological transformations plan, has invests few, the effective quick characteristic, achieves the enhancement working efficiency, to reduce the gear-hobbing machine bed to present the breakdown the possibility, achieves the efficiency, the reliable goal.