Device for blocking flood entering tunnel in flood season of water conservancy project construction

The utility model discloses a device for blocking flood entering a tunnel in the flood season of hydraulic engineering construction, which comprises two concrete supports, a plurality of water fenders, reinforcing rib steel bars and fixing rings, the plurality of water fenders are arranged between the two concrete supports, a plurality of vertical slots are arranged on the backwater sides of the water fenders along the length direction at intervals, and the reinforcing rib steel bars are arranged in the vertical slots. A fixing ring protruding outwards is fixed to each inserting groove, the inserting grooves and the fixing rings form a space allowing reinforcing rib steel bars to penetrate through, protruding strips/grooves are formed in the top faces/bottom faces of the water baffles in the length direction, a rubber water stop belt is arranged between the two water baffles, and through clamping of the protruding strips and the grooves of the contact faces of every two adjacent water baffles in the vertical