The invention relates to a test system of a current protection value and a current protection time for a current transformer. The test system comprises a load, a monitoring background and a power supply unit, wherein the AC output end of the current transformer is connected with the load; the power supply unit is connected with the DC input end of the current transformer; and the monitoring background is connected with a control unit of the current transformer. The test system is high in accuracy and simple in operation, and can prevent damaging the current transformer because the current value is too large, and can improve the work efficiency to some extent.