Abstract: In order to solve the problem that the unreasonable motor speed planning of the cutting machine in the cutting process caused the reduction of the cutter life and the large noise of the equipment, the motion planning based on the PVT (position P, velocity V, time T) motion mode was carried out and experimented. Through modeling the cutting mechanism to determine the overall operation stage and propose a velocity optimization plan; analyzing the cutting stage to determine the motion law to meet the PVT motion planning conditions; adopting GTSD14 controller and software Otostudio to implement the PVT algorithm. Field debugging and application show that symmetrical and asymmetrical motion planning algorithms can meet the planning goal which cutting stage cycle is fixed and the cycle of the whole machine can be adjusted. The performance of asymmetrical mode is better, so this topic finally adopts the PVT description method of the asymmetric mode to realizes motion planning. So that the cutting machine has a constant cutting speed when the whole machine is running at a high speed to reduce noise and vibration and improve the life of the cutter.