The invention relates to a hydraulic engineering pipe fitting stacking industrial robot. The hydraulic engineering pipe fitting stacking industrial robot comprises a traveling device, an adjustable support, a rotary device, a three-degree-of-freedom parallel mechanism and a clamping device; the adjustable bracket is located on the rear upper side of the traveling device; the rotary device is located in the front end position of the adjustable support, and is fixedly connected with the adjustable support; the three-degree-of-freedom parallel mechanism is located between the rotary device and the clamping device; the upper end of the three-degree-of-freedom parallel mechanism is connected with the rotary device; and the lower end of the three-degree-of-freedom parallel mechanism is connected with the clamping device. The hydraulic engineering pipe fitting stacking industrial robot can realize a series of operation including grabbing, carrying and stacking of water conservancy and hydropower pipelines, is high in automation degree and stable and flexible in motion, solves such problems as high manual carrying operation cost, low efficiency and high dangerousness, the horizontal interval and vertical interval of the clamping device are adjustable, thereby facilitating grabbing of the water conservancy and hydropower pipelines with different diameter sizes, grabbing and stacking are convenient and rapid, clamping is stable and firm in the carrying process, slipping is not easy to occur, and the safety is good.