The invention discloses a water conveying pipeline supporting device for hydraulic engineering. The device comprises a bottom plate, wherein a fixed frame is arranged on the outer wall of the top of the bottom plate, clamping mechanisms are arranged on the fixed frame, supporting mechanisms are arranged between the bottom plate and the fixed frame, each clamping mechanism comprises a stud, a rotating rod and a universal ball, threaded openings are formed in the outer walls of the four sides of the fixed frame respectively, each stud is rotationally arranged in the corresponding threaded opening, a universal seat is fixedly connected to one end of each stud, each universal ball is rotationally arranged in the corresponding universal seat, the rotating rods are annularly distributed on the outer walls of the studs at equal intervals, an inserting groove is formed in each universal ball, a limiting hole is formed in one end of each stud, an inserted rod is inserted into the inner wall ofeach limiting hole, and the outer wall of each inserted rod is matched with the inner wall of the corresponding inserting groove. According to the device, the moving and rotating processes of a pipeline are both very smooth, the laying efficiency of the water conveying pipeline is effectively improved, the outer surface of the pipeline cannot be damaged, and the using effect is better.