High-sealing-performance stop valve

The invention relates to the technical field of stop valves, in particular to a high-sealing-performance stop valve comprising a shell. The two ends of the shell are each provided with a pipeline. Fixed components are arranged at one ends of pipelines. The upper portion and the bottom of the shell are each provided with a first opening, and an upper cover plate and a lower cover plate are arrangedon the upper portion and the bottom of the shell correspondingly. The upper cover plate and the lower cover plate cover the first openings correspondingly. Fixed columns are symmetrically fixed to the upper portion of the lower cover plate. A frame is connected to the upper ends of the fixed columns. Partitions are symmetrically fixed in the frame. Rubber plugs are arranged on one side of a fixedplate and are located at one ends of the pipelines correspondingly. One end of a threaded rod penetrates through the partitions and extends out to be connected with a linkage mechanism. The high-sealing-performance stop valve