Optical lens clamping tool

The invention relates to an optical lens clamping tool which comprises a base, grabbing ring discs are fixedly installed on the surfaces of three guide blocks, four limiting mechanisms used for being adsorbed to a table top are installed in the base, the base is placed on the table top, and four rubber suction cups of the base are preliminarily adsorbed to the table top; the adjusting bolt is rotated to drive the sealing piston to move upwards in the fixing cylinder, the sealing piston is a rubber piston, and the surface of the sealing piston is tightly attached to the inner wall of the fixing cylinder, so that negative pressure is generated in the fixing cylinder, and fixation of the base is enhanced; the stretching rod is pulled upwards through the pull ring part, so that the sealing piston is driven to move upwards in the fixing cylinder, negative pressure is generated in the fixing cylinder, the sealing piston is firmly adsorbed to a table top, the stretching rod moves to a limiting threaded groove in the