Synchronous clamping mechanism acted by hydraulic cylinder

The utility model relates to a synchronous clamping mechanism acted by a hydraulic cylinder. The synchronous clamping mechanism comprises a left-side clamping arm, a right-side clamping arm, a clamping cylinder, connecting rods, a base frame and synchronous gears, wherein the two ends of the base frame are respectively and rotatably connected with hinging connection holes formed in the left-side clamping arm and the right-side clamping arm; the end parts of the left-side clamping arm and the right-side clamping arm are respectively provided with one connecting rod; the end parts of the connecting rods at the two sides are respectively and fixedly connected with the synchronous gears; the synchronous gears at the two sides are mutually meshed; a cylinder body and a piston rod of the clamping cylinder are respectively and rotatably connected with cylinder connecting holes of the left-side clamping arm and the right-side clamping arm. The synchronous clamping mechanism has the advantages that the left-side clamp