Gate valve preventing drop of valve rod and valve plate

The utility model discloses a gate valve preventing drop of a valve rod and a valve plate. The gate valve comprises a valve plate body for sealing a pipeline, and a valve rod fixed with the valve plate body, wherein the upper part of the valve rod is provided with a driving thread matched with a driving device; and the gate valve is characterized in that an annular fixing sleeve for reinforcing is arranged at the joint between the valve rod and the valve plate body. According to the gate valve preventing drop of the valve rod and the valve plate, disclosed by the utility model, since the lower part of the valve plate is provided with the annular fixing sleeve fixed with the valve plate body and the valve rod, the valve plate body and the valve rod are further fixed; and even if the valve plate of the gate valve is subjected to scouring and corrosion of high-pressure water and oil-water mixture, relatively long service life of the whole gate valve can be guaranteed, and accidents in production, management and