Adjustable supporting structure for water conservancy pipeline installation

The adjustable supporting structure comprises a supporting semicircle and an internal thread ring, a fixing seat is installed on one side of the supporting semicircle, the inner side of the fixing seat is movably connected with a connecting seat through a connecting shaft, a limiting semicircle is installed on one side of the connecting seat, and the limiting semicircle is movably connected with the inner side of the fixing seat through a connecting shaft. By installing the handle, the threaded rod and the lower pressing plate, a user holds the handle to rotate the handle, the handle rotates to drive the threaded rod at the bottom end to rotate, the threaded rod rotates through the threads, the lower pressing plate is movably connected with the inner side of the threaded rod through the threads, and therefore the user can conveniently use the device. The inner side of the inner threaded ring moves up and down, after a pipeline is placed on the inner side of the supporting semicircle, the bottom end of the thr