Composite flow valve

The invention discloses a composite flow valve with a composite material valve base, which comprises the valve base, a valve core, a valve core guide rod, a pressure springs, a fluid intake valve inlet and a flow discharge valve outlet, wherein the valve base consists of an external valve base shell and an internal liner body; the inside surface of the external valve base shell is lined with the internal liner body, and the external valve base shell and the internal liner body are tightly combined to form a composite material. The internal liner body with a certain thickness has a fluid contact surface; and the internal liner body of the valve base can be made of corresponding materials according to different use requirements on the composite flow valve. The external valve base shell of the valve base is made of a pressure resistant material and does not contact with the fluid directly; and the force applied on the internal liner body is transferred to the external valve base shell, so the overall mechanical property is reliable. The valve base of the composite flow valve with the integrated composite structure can meet pressure and flow rate requirements and requirements on high working temperature and the like, and has low cost.