For the situation that the operation trajectory needs the on-site debugging because of the difference in actual size of the workpiece, an amending solution for the operation trajectory on parallel moving function is proposed based on Yaskawa Industrial robot by analyzing the general flow of the workpiece grabbing job.Combined with the grinding workstation application,the amending module was designed which adopted the touch screen operation, Programmable Logical Controller (PLC) controlling and the performing of the industrial robot. The following functions were contained such as the main amending function, motion setting, position choosing, XYZ moving and restriction function. Through the amending operation of the key operation position,the parallel playback of the operation trajectory is completed based on Yaskawa Industrial robot, which will reduce the work load of the onsite debugging and reduce the difficulty of debugging.