The utility model relates to a hydraulic engineering technical field specifically is a water conservancy pipeline supports connection structure for hydraulic engineering, including the base, the spout has been seted up to the upper end of base, sliding connection has four sliders in the spout, the sleeve is installed to the upper end of slider, it has the stand to peg graft in the sleeve, the lateral wall lower extreme of stand has two rows of slide bars along vertical direction symmetric connection, the first recess that corresponds with the slide bar is seted up to telescopic inner wall, the left side of first pipeline is connected with screw sleeve, the right side and the screw sleeve screw of second pipeline cup joint, the on -line screen storage device comprises a base, the one end of threaded rod is connected with the lateral wall of first pipeline, and the left side is four the one end of threaded rod is connected with the second pipeline. The utility model discloses simple structure, easy operation need not pipeline cutting, and save material has saved the manpower.