Way throttle valve

The utility model relates to a one-way throttle valve. The one-way throttle valve comprises a one-way passage and a throttle passage. The flowing direction of the one-way passage is from a valve port A to a valve port B, and the one-way passage passes first throttle grooves, a radial hole and an axial hole. The flowing direction of the throttle passage is from the valve port B to the valve port A, the throttle passage passes the axial hole, the radial hole, the first throttle grooves and a second throttle groove, the first throttle grooves, the second throttle groove, the radial hole and the axial hole are all formed in a valve body, the valve port A and the valve port B are both arranged on a valve seat, a first cavity is formed in the valve seat, and the valve body is arranged in the first cavity and can slide between the valve port A and the valve port B. The one-way throttle valve can achieve the function of a one-way valve and the function of a throttle valve, the function of the throttle valve is achieved through the throttle grooves, and the one-way throttle valve is small and compact in structure, flexible in installation mode and not prone to blockage.