The invention provides a voltage stabilizer testing tool which comprises a voltage change-over switch, a load change-over switch and an IC clamp. The voltage change-over switch is connected between a plurality of power sources and the IC clamp and used for switching among the multiple power sources in the testing process; the load change-over switch is connected between multiple loads and the IC clamp and used for switching among the multiple loads in the testing process; the IC clamp is used for containing a voltage stabilizer to be tested. By means of the voltage stabilizer testing tool, when testing is carried out, the voltage stabilizer to be tested only needs to be contained in the IC clamp, testing can be completed by operating the voltage change-over switch and the load change-over switch, the complex connection, disassembling and assembling working procedures in the testing process are avoided, the testing process is simplified, and the testing efficiency is greatly improved.