Full-drainage and half-drainage control mechanism of double-drainage drainage valve

The utility model discloses a full-drainage and half-drainage control mechanism of a double-drainage drainage valve, which comprises a valve seat, a full-drainage button, a half-drainage button, a full-drainage floating barrel component, a half-drainage floating barrel component, a swing rod and a pull rod, the full-drainage button and the half-drainage button are mounted in the valve seat in a vertically movable manner, and the swing rod is rotatably mounted in the valve seat. One end of the swing rod is located below the full-drainage button and the half-drainage button, the other end of the swing rod is connected with the pull rod, the full-drainage floating barrel assembly and the half-drainage floating barrel assembly are installed in the valve seat, the pull rod can be hung by the full-drainage floating barrel assembly or the half-drainage floating barrel assembly when the pull rod is lifted, and a swing block for limiting floating of the full-drainage floating barrel assembly is further arranged in the