Grading production line of photovoltaic module

The invention belongs to the technical field of photovoltaic modules, and particularly relates to a photovoltaic module grading production line which comprises a storage table, a limiting rail and a grading station are fixedly arranged on one side of the storage table, a supporting frame is fixedly arranged on the back face of the limiting rail, and the bottom of the supporting frame is fixedly connected with the grading station. By arranging the vertical plate, the threaded rods, the clamping plates and the limiting rods, after photovoltaic panels are packaged, the two threaded rods are rotated clockwise, the two threaded rods drive the clamping plates to be close to each other, rotation of the threaded rods can be stopped when the sides, away from the threaded rods, of the clamping plates are attached to the photovoltaic panels, and the two clamping plates can block a photovoltaic panel assembly; and after the clamping plates are adjusted, the limiting frames are inserted into the limiting plates, the limit