The invention relates to a current-limiting control valve, which comprises: a valve body, a membrane, a spring, a valve base, a valve rod, a tube connecting port, a transmission plate and an adjusting screw slide rod, wherein the membrane is at the middle of valve body to divide the valve body into sealed upper and lower parts; the transmission plate is under the membrane; the valve rod and valve base are under the transmission plate; the control springs are arranged under the transmission plate, the valve rod and the outer side of valve base; the control spring contacts the transmission plate; the limit spring is arranged under the valve rod to support the valve rod to move upwards; the adjusting spring is above the membrane; the adjusting screw sliding rod is above the adjusting spring to control the adjusting spring to move transmission plate downwards. The invention is one safety protector, to control the pressure of decompressor and control the liquid flux, to confirm the normal operation in abnormal condition. And it has simple structure, simple operation and reliable property.