The invention discloses an indirect effect type fuel metering device which comprises a pipeline delivery system, a high-temperature oval gear flowmeter system, an equivalent valve metering system and an indirect constant differential pressure valve control system. The indirect effect type fuel metering device is simple in structure and small in opening degree stroke, steady-state errors are effectively decreased, and the indirect effect type fuel metering device is high in reliability. In addition, the high-temperature oval gear flowmeter system is adopted, the control precision is high, and outside influence factors are small. Furthermore, when the spherical equivalent valve metering system and the indirect constant differential pressure valve control system are matched to control pressure and flow of fuel, meanwhile fuel flow control mainly relies on that the stroke of a main piston is controlled by a differential pressure valve, accordingly input flow of an oil port is changed, the purpose of stably metering previous and later differential pressures of the valve, the opening stroke of the differential pressure valve is smaller in the mode, and accordingly steady-state errors can be effectively decreased. The device can be widely applied to aero-engines needing high precision.