Gas supply system of high-performance gas engine

The invention relates to a gas supply system of a high-performance gas engine. The gas supply system comprises a gas supply unit, and a main stop valve, multiple pressure gauges, multiple pressure sensors, a temperature sensor, a manual inert filling valve, a pressure adjusting valve, multiple stoop valves and multiple discharge valves arranged in a valve set box. The gas supply system adopts a double-branch gas supply system; one branch of the gas supply system is connected to a main combustion chamber; and the other branch is connected to a pre-combustion chamber. The gas supply system can precisely control the gas pressure and flow of each branch according to working conditions of an engine, so that an air-fuel ratio of the engine is located in an optimal position, and the highest combustion efficiency and performance are obtained; in particular, for a large-cylinder-diameter engine, if direct ignition is performed in a cylinder, needed energy is too great to be realized; and sparks generated by the ignition in the pre-combustion chamber are injected into the cylinder for combustion through the pre-combustion chamber with a smaller space to generate the effects of energy conservation and high efficiency.