Stop valve for pipeline connection

The utility model relates to a stop valve for pipeline connection, which is used for guiding a cooling medium guided in by an outdoor system of an air conditioner into an indoor system of the air conditioner. The stop valve for pipeline connection comprises a valve body and a valve bonnet. A sealing surface of an upper port of a valve body in the prior art is conical, and a sealing part of a valve bonnet of the valve body in the prior art is right-angled. In the utility model, a sealing surface of the valve body is designed as a plane, the outer side of the sealing surface is provided with a bulge part, a sealing part of the valve bonnet is designed into an acuter-angled shape, so that the sealing part of the valve bonnet and the sealing plane of the valve body can seal in a matching way, thus the utility model solves the problem that the sealing surface of the valve body can be damaged easily and prevents the upper port of the valve body from radial deformation as a result of horizontal action of the tighten