Optical lens clamping tool

The utility model relates to an optical lens clamping tool which comprises a base, a grabbing ring disc is 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, four rubber suction cups of the base are adsorbed to the table top preliminarily, and a clamping groove is formed in the base. 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 r