The invention relates to a plastic steel fuel gas valve which comprises a valve body, a valve element arranged in the valve body and a valve rod which drives the valve element. A valve body flow path is arranged inside the valve body. The wall face of the inner side of the valve body flow path is covered with a steel sleeve. The upper end of the valve element is positioned through the valve rod. The lower end of the valve element is positioned to the steel sleeve. Cover plate assemblies are fixed to the two axial ends of the valve body flow path. Sealing pads are arranged in the cover plate assemblies. The end face of the inner side of each sealing pad comprises sharp end portions on the two sides and a sealing portion located between the two sharp end portions. According to the plastic steel fuel gas valve, on one hand, the center of the valve element is positioned by the steel sleeve and the valve rod, the sealing pads on the upstream and downstream of the valve element are always in a free and effectively ordinary state, and long-time using sealing performance is ensured; and on the other hand, the sealing pads in the fuel gas valve can prevent possible granules from damaging the valve element while ensuring the sealing performance.