The invention relates to a small-capacity contactor acting characteristic test system. According to the small-capacity contactor acting characteristic test system, a tested contactor is fixed on a test object installation platform; the test object installation platform performs integrated processing on a hardware circuit; the hardware circuit required by testing can be constructed clearly and conveniently through the test object installation platform; signals are collected by a signal acquisition card and are transmitted through an RS485 bus; when testing is performed, an industrial personal computer automatically controls the selection of power sources, the output of the voltages of the power sources, the selection of voltage and current sensors, the selection of loads, and the like; acquired data are transmitted back to the industrial personal computer through a testing program, so that the industrial personal computer can process and save the data; and test results can be obtained and printed. With the test method adopted, the automatic measurement of the acting characteristic parameters of a contactor can be realized, cumbersome manual measurement and data analysis and processing work can be avoided, and test efficiency can be improved.