The invention aims to provide a combined double-electromagnetic-valve gas injection valve. Through the mode that an electromagnet is electrified to absorb armatures, a valve element combination moves away from a valve seat under the inner guide action of a guiding pin, and the function of gas valve gas injection is achieved; the gas injection process is controlled by adopting two electromagnetic valves, and through the modes that one of the electromagnetic valves independently works, the two electromagnetic valves simultaneously work, and one electromagnetic valve acts at first and then the other electromagnetic valve acts, the three operation modes of low-flow gas injection, high-flow gas injection and variable flow gas injection can be achieved; through cooperation of a pressure balance hole, a pressure balance groove and a pressure stabilizing cavity, fluctuation of the gas pressure in the gas injection valve can be effectively suppressed, stable operation and reliable operation of gas flow are achieved, and the high response speed is achieved; and through a mixed gas inlet mode of axial main gas groove direct gas inlet and circumferential supplementation hole gas inlet, high flow is achieved, the gas supply efficiency of an engine is effectively improved, meanwhile, gas flow interference can be avoided, and gas path stability is achieved.