Automotive fuel cell hydrogen circulating system

The invention discloses an automotive fuel cell hydrogen circulating system, which is characterized by comprising a multi-point sequential injection system, a Venturi tube, a hydrogen flowmeter and a back pressure valve, wherein the multi-point sequential injection system and the Venturi tube are combined to realize fuel cell hydrogen circulation. The automotive fuel cell hydrogen circulating system has the advantages that: the multi-point sequential injection system is adopted to control the hydrogen flow, and is combined with the Venturi tube, so that the hydrogen is circulated, the hydrogen utilization rate is improved, the hydrogen side drainage is strengthened, the hydrogen side humidification is effectively improved, and the water in the fuel cell is effectively managed; and the device is simple, safe, reliable and low in cost, and can be used for vehicle-mounted environment.