Gate frame fixing mechanism

The invention relates to the technical field of water conservancy projects, in particular to a gate frame fixing mechanism which comprises a protection bottom plate, a gate, two gate frames, a pressing plate, two moving blocks, two first sliding plates and two second sliding plates. A first groove is formed in the upper end surface of the protection bottom plate; a mounting groove is formed in the bottom surface of the first groove; a plurality of third limiting columns are arranged on the bottom surface of the pressing plate; the multiple third limiting columns penetrate through the bottom end of the protection bottom plate. The two second sliding plates are slidably connected with the inner walls of the two mounting grooves correspondingly, and the two second sliding plates are each provided with a plurality of first limiting columns. The two moving blocks are connected with the two second sliding plates correspondingly. The two first sliding plates are connected with the upper end faces of the two second s