Supporting structure for road tunnel building

The invention discloses a supporting structure for road tunnel building, and relates to the technical field of tunnel supporting equipment. A support is included. The surface of the support is fixedly connected with a supporting top plate, and a plurality of water leakage holes are formed in the surface of the supporting top plate in a penetrating mode. The surface of the support is fixedly connected with a reel in a rotating mode, and waterproof cloth is arranged on the surface of the reel. A water storage tank is fixedly connected to the surface of the support; an opening I is formed in one side, close to the reel, of the water storage tank; a hook is arranged at the end of the waterproof cloth and connected with the inner wall of the water storage tank in a clamped mode. A water outlet hole is formed in the bottom end of the water storage tank, and a screen is fixedly connected to the inner wall of the water outlet hole. Through mutual cooperation of the structures, the interior of the tunnel is supported;