The invention relates to a device for detecting the function of an oil fuel booster pump of a civil aircraft. The device comprises a main fuel tank, an auxiliary fuel tank, a fuel oil liquid indicator, a fuel oil liquid regulating valve, a flow (pressure) regulating valve, a turbine flowmeter, a precision pressure gauge, an electric motor pump assembly, an oil suction filter, an oil return filter, a blocking alarm, a flow quantity display meter, a shutoff valve, a medium frequency amperemeter, an operation table, a cooler and a thermometer. In the device, the alternative test oil of which the oil flash value is much higher than that of aviation fuel oil RP-3 is adopted, so that the risk of combustion explosion under the factory condition is reduced; the main fuel tank and the auxiliary fuel tank do not turn over, and the oil leakage is avoided; rapid and accurate regulation on the height of liquid level is ensured by an oil well pump and the liquid regulating valve; more quick and stable regulation on the flow of the outlet of a tested pump is realized by an electric control precision throttling valve; and the temperature of a fuel oil tank is stabilized within the ranges of setting temperature + / -2 DEG C because the opening of a proportion water valve is matched with the temperature of the fuel tanks. The whole equipment system has a compact structure, safe and practical performance and attractive appearance, and is efficiency and convenience in operation.