Laser welding seam surface polishing device

The utility model relates to the technical field of weld joint processing, and discloses a laser welding weld joint surface polishing device which comprises a workbench, an installation frame is fixedly installed on the two sides of the workbench together, an ejector block is fixedly installed on the lower surface of the top of the installation frame, a threaded rod is rotatably installed on the ejector block through a bearing, and a motor is fixedly installed on one side of the ejector block. The output end of the motor is fixedly connected with one end of the threaded rod, and a moving block is installed on the top block through threads. A welding seam of a plate is located below the polishing block, the plate can be limited by starting the four hydraulic oil cylinders, a limiting column can prevent a connecting plate from deviating, a rotating rod is rotated to enable a sliding frame to move downwards, a pressing plate can make contact with the upper surface of the plate, and the plate can be limited and f