The invention provides a hydrogen circulating pump testing device for a fuel battery system. A main pipeline, a first branch pipeline and a second branch pipeline are included; the main pipeline is sequentially provided with a gas pressure meter, a flow meter, a pressure release valve and a first electromagnetic valve from the gas inflow end to the discharging end; the first branch pipeline comprises a second flow meter and a first one-way valve; the second flow meter communicates with a pipeline arranged between the flow meter and the pressure release valve through the first one-way valve; the second branch pipeline communicates with a pipeline between the pressure release valve and the first electromagnetic valve; and a hydrogen circulating pump can be installed between the second flow meter and the second branch pipeline. The hydrogen circulating pump testing device for the fuel battery system solves the technical problems that in the matching process of the fuel battery system, choosing is directly performed in a traditional method, matching directing at different fuel battery engines is not performed, and development of the fuel battery system is not facilitated.