Fishway outlet system

The invention discloses a fishway outlet system. The fishway outlet system adapts to water level change and comprises a base table, a base, a power shaft, a fishway outlet section and a rotating cylinder. The base is fixed to the water bottom, the upper end of the power shaft is fixed to the base table, and the lower end of the power shaft is rotatably fixed to the base. The fishway outlet sectionextends from bottom to top in a cylindrical spiral line mode, and multiple stages of fishway outlets are formed in the fishway side wall of the fishway outlet section. The top of the rotating cylinder is fixedly connected to the base table so as to be driven by the power shaft to rotate, the cylinder wall of the rotating cylinder is provided with multiple stages of outer wall openings, and the multiple stages of outer wall openings in the rotating cylinder correspond to the multiple stages of fishway outlets of the fishway outlet section, so that the multiple stages of fishway outlets can besequentially opened when t