A medical rotary switch connector comprising a connector base (2), infusion connectors (6), a solution-outlet connector (1), and a valve. The valve comprises a valve core (4) and an exposed operating knob (3). The valve core (4) and the operating knob (3) are either integrally constructed or separately constructed but integrally connected. The valve core (4) is sealedly connected to a corresponding part of the connector base (2) in a way that allows rotation relative to the connector base (2). A flow diversion groove is provided in the axial direction on the outer peripheral surface of the valve core (4). One extremity of the flow diversion groove corresponds to an infusion channel diverted thereby, while the other extremity is in communication with a solution-transferring cavity of the inner core of the connector base (2). The rotary switch connector is applicable in medical procedures as a connecting switch for liquid diversion, convergence, drawing, injection, and drainage scenarios, generates no negative pressure when a penetrating needle is withdrawn at the completion of an infusion, is capable of closing off a medicinal solution injection channel for intermittent infusion, also allows for diverted or converged infusion, is convenient to operate, and is applicable in various medical scenarios.Ce commutateur rotatif à des fins médicales comprend une base de commutation (2), des contacts pour perfusion (6), des contacts pour prélèvement (1) et une soupape, laquelle comprend un obturateur (4) et un bouton de fonctionnement (3) saillant, que ledit obturateur (4) soit solidaire ou non du bouton de fonctionnement (3), il est couplé en un seul tenant avec ce dernier. Lobturateur (4) est relié hermétiquement à lemplacement correspondant de la base de commutation (2) de manière à la faire pivoter. Sur le pourtour externe de lobturateur (4) est pratiquée axialement une rainure conduisant le liquide dont une extrémité correspond à la bouche du canal de perfusion et dont l
