Abstract: A new type of integrated test bench for mine-used high-voltage protector was designed. The overall structure and design schemes of software and hardware of the test bench were introduced. Fault signals are provided by the test bench which takes S7-300 PLC as a controller such as short-circuit current, over current, under-voltage, over-voltage, zero sequence over-voltage, zero sequence over-current and so on. Fault information, test items and relative hardware running status are displayed on monitoring interface of upper computer so as to detect performance of high-voltage protector quickly. Function of the test bench was tested by taking current protection function test of ZBT-11 type high-voltage protector as an example. The test result shows that the test bench can detect faults of high-voltage protector quickly and accurately. The practical application verifies perfect effect of the test bench.