The invention relates to a fuel gas proportioning valve, in particular to an adjustable fuel gas proportioning valve. The adjustable fuel gas proportioning valve comprises a valve main body, wherein the valve main body comprises a fuel gas pipeline and an output cover; a fuel gas passage is arranged in the fuel gas pipeline; a fuel gas output port is formed in the output cover; the fuel gas passage is respectively communicated with a fuel gas input port and the fuel gas output port; a fuel gas adjusting pressure stabilizing device is arranged between the fuel gas pipeline and the output cover. The adjustable fuel gas proportioning valve has the beneficial effects that a permanent magnet is adopted to form a permanent magnetic field, an electromagnetic coil is adopted in the middle, the acting force between the coil and a peripheral permanent magnet changes due to the change of current on the coil so as to change the stroke of the coil, and the coil is a soft material and is free of magnetic retardation; when the displacement of the coil reaches the maximum set value, buckles are hung by high-flow stop nuts, so that the coil cannot move any longer, the maximum opening degree of a pressure regulating throttle port is limited; low-flow stop screws are adjusted, so that the minimum opening degree of a bulb stopper and the pressure regulating throttle port is pre-regulated.