Liquid guide connecting valve

The utility model relates to the technical field of medical pipe fittings, in particular to a liquid guide connecting valve which comprises a valve body, a liquid inlet pipe, a liquid outlet pipe, a sliding seat, a piston rod, a piston, a sliding connecting piece and a valve body sealing seat. According to the utility model, the liquid inlet end of the liquid inlet pipe is connected to the upstream of the pipeline to be subjected to fluid flow control, and the liquid outlet end of the liquid outlet pipe is arranged at the downstream of the pipeline to be subjected to fluid flow control, so that the valve body is used for performing fluid flow control on the pipeline to be subjected to fluid flow control. The piston rod is driven by the sliding seat to slide in the valve body, so that the piston is driven to slide in the valve body, when the piston is located between the liquid inlet pipe and the liquid outlet pipe, the valve body is in a closed state, and when the piston is not located between the liquid inle