The invention discloses a 
polishing mechanism for 
robot machining. The 
polishing mechanism comprises a 
workbench, wherein stand columns are connected to the four corners of the bottom part of the 
workbench, fixing blocks are connected to the left side and the right side of the bottom part of the 
workbench, a lead screw is rotationally connected between the two fixing blocks, a lead screw motor is connected to the left end of the lead screw, a nut base is in threaded connection with the outer wall of the lead screw, supporting frames are symmetrically connected to the front end and the rear end of the nut base, the upper ends of the two supporting frames are jointly connected with a horizontal plate, the bottom part of the horizontal plate is connected with a 
polishing assembly, a middle rotating shaft is rotationally connected to the right side of the top part of the workbench, a steering table is connected to the top part of the middle rotating shaft, a turnover frame is connected to the top part of the steering table, a clamping 
assembly is installed at the upper end of the turnover frame, and the right side wall of the workbench is connected with a PLC. The polishing device is reasonable in structural design, 
robot parts can be polished and machined in multiple directions, frequent loading and unloading are avoided, the 
machining efficiency can be improved, the 
machining process is stable and reliable, the machining quality can be effectively guaranteed, and a good machining environment can be kept.