Pressure-limiting check valve

The utility model provides a pressure limiting check valve which comprises a left valve body, a right valve body connected to the outer wall of one side of the left valve body, a pressure limiting block arranged in the left valve body, a baffle arranged in the left valve body and located on one side of the pressure limiting block, and an assembling mechanism arranged on the outer surface of the left valve body and comprising a first assembling block. The first assembling block is fixed to the outer wall of the left valve body, the outer wall of the right valve body is fixedly connected with a second assembling block, the outer wall of one side of the second assembling block is fixedly connected with an inserting rod, the first assembling block is matched with the outer wall of the inserting rod in an inserted mode through an formed inserting groove, and two limiting plates distributed in a bilateral symmetry mode are arranged on the outer side of the first assembling block. And a telescopic groove is formed i