Inner support adsorption device

The invention provides an inner support adsorption device. The inner support adsorption device comprises a rack, a pair of adsorption assemblies, a synchronous belt assembly and a guide assembly, wherein the adsorption assemblies are arranged below the rack and can adsorb and fix a workpiece from the inner side of the workpiece at the same time; the synchronous belt assembly is arranged on the rack and used for driving the adsorption assemblies to move face to face or back to back; the adsorption assembly comprises a driving block movably connected with the guide assembly, a pair of suction cup assemblies arranged at the bottom of the driving block and used for adsorbing the inner wall of the workpiece, and a connecting plate for fixing the driving block and the synchronous belt. According to the internal support adsorption device, the synchronous belt assembly drives the pair of adsorption assemblies fixed to the synchronous belt to move in the opposite direction or the back-to-back direction, so that the re