Stop check valve with good sealing performance

The utility model discloses a stop check valve with better sealing performance, which comprises a valve assembly, a valve seat, a valve seat, a valve seat, a valve seat, a valve seat, a valve seat, a valve seat and a check valve seat, and is characterized in that the valve seat is provided with a valve cavity; the two medium channels are arranged on the two sides of the valve assembly correspondingly, and the two medium channels communicate with each other through the communicating hole; the valve element is arranged in the valve cavity in an up-down moving mode, the axis of the valve element is perpendicular to the table body, the valve element can move to close the communicating hole, and the valve element is in sealing fit with the table body; the pushing structure is arranged between the valve element and the valve assembly, the pushing structure can act on the valve element so that the valve element can be kept in a sealing fit state when abutting against the table body, and no matter the valve assembly