The invention relates to a throttle valve, which comprises a valve body (1) provided with a flow channel (13) and a mounting hole (14) inside, a valve core movably inserted in the mounting hole, and a valve core driving structure arranged outside the valve body and connected with the valve core. The throttle valve is characterized in that: the valve core driving structure directly drives the valve core to slide axially; the valve core driving structure comprises a valve seat (2), a coil (3), a magnetic component (4), an iron core (5) and an elastic element; the inside of the valve seat is provided with a cavity (21); the valve core extends out of the valve body and enters the cavity; the coil (3) is arranged in the cavity of the valve seat; the magnetic component (4) is positioned in the coil and is driven to slide relative to the coil under the action of an electromagnetic force generated after the coil is powered on; the iron core (5) is connected with the valve core and the magnetic component (4); the elastic element acts on the valve core; and a damping force generated by the elastic element for the valve core resists the electromagnetic force generated by the coil for the magnetic component. The valve core driving mode does not need a stepping motor structure, a gear pair structure and a screw thread pair structure, so the throttle valve has the advantages of simple structure, low cost and light weight.