Abstract: The paper discussed theory and research method of trajectory planning of industrial robot,and introduced realization method of software of trajectory planning of industrial robot based on VC++.The software can make robot to plan collision-free trajectory in real-time,and use ROSTY software to draw simulation diagram of mechanism of collision-free position and pose.Meanwhile,through experiment of Motoman-HP3 robot,it realized application using external interface function of Motocom32 software called by VC++ application program to plan trajectory for industrial robot.The simulation experiment proved that the software of trajectory planning of robot can realize remote control and ensures position precision for robot.