Hydraulic backwater gate of pipe truss structure

The utility model relates to a hydraulic water-retaining strobe of a tubular frame structure, which comprises a faceplate used for stopping water along the circumferential direction and lateral girders which act as the stress pivots of the strobe and take effect of stopping water at the sides. The lateral girders are fixedly connected with two sides of the faceplate vertically. A bifoil space tubular frame is vertical to the faceplate and connected with the faceplate. Two ends of the bifoil space tubular frame are fixed and connected with the lateral girders. The bifoil space tubular frame comprises a first arch and a second arch in opposite directions. The first arch and the second arch form a fish-bellied bifoil structure and are fixed and connected with the faceplate by a small vertical truss.