Hydraulic synchronous vice

The utility model discloses a hydraulic synchronous jaw vice, and belongs to the technical field of jaw vices. The clamp comprises a clamp base, a first channel is formed in the inner top of the clamp base, a forward sliding block is slidably connected in the first channel in a sleeved mode, the forward sliding block is in a table shape, backward sliding blocks are slidably connected to the two side walls of the forward sliding block in a sleeved mode respectively, and a scrap-proof cover plate is further installed on one side of the clamp base. The two backward sliding blocks are arranged on the front sliding block and located between the two backward sliding blocks, one ends of the two backward sliding blocks extend out of the clamp base, a second channel is formed in the inner bottom of the clamp base, and a driving assembly is arranged in the second channel and used for driving the front sliding block to move. According to the device, the oil cylinder pull rod, the forward sliding block, the backward slid