Constant flow control valve

The embodiment of the invention discloses a constant flow control valve, and belongs to the technical field of separated layer water injection. The constant flow control valve comprises a shell, an adjusting cylinder, a lower main body and a constant flow valve assembly, wherein the adjusting cylinder, the lower main body and the constant flow valve assembly are located in the shell; the lower main body is provided with a first eccentric hole, and the constant flow valve assembly is located in the first eccentric hole; the constant flow valve assembly comprises a first sleeve piece, a constant flow valve element, a lower spring and a valve sleeve. The upper end of the constant-flow valve element is conical, the lower end of the constant-flow valve element is inserted into a through hole in the lower end of the valve sleeve, one end of the lower spring is fixed to the valve sleeve, and the other end of the lower spring makes contact with the constant-flow valve element. The constant-flow valve element moves up