Clamp for pre-cleaning lens

The utility model relates to a lens pre-cleaning fixture, including frame body, clamping support and clamping subassembly, the frame body is limited in the frame space is inserted with a plurality of layers of stacked clamping support, the array hitch on the clamping support is connected with a plurality of clamping subassembly, the clamping subassembly is connected with the frame body, and the clamping subassembly is connected with the frame body. The clamping assembly clamps the to-be-cleaned lens in the mode that the edge contours of a plurality of different areas of the to-be-cleaned lens abut against and limit the to-be-cleaned lens, and therefore the to-be-cleaned lens is detachably hung on the clamping support in the mode that the surfaces of two lens bodies are exposed. The clamping assembly comprises a positioning bottom plate, an adjusting plate and a plurality of clamping pieces, and the multiple clamping pieces penetrate through the adjusting plate and are movably arranged on the positioning botto