ln this paper , the performance of the audio power amplifier l_M386 is tested by using the ST3020 testsystem.Firstly ,the working prineiple and key performanee parameters of LM386 are brielly introdueed ,and themeasurement methods of core perormanee indieators sueh as quieseent current , input bias current , inputresistanee , voltage gain , power supply rejeetion ratio , and total harmonie distortion are emphatically diseussed.Through the test resulis, the high elicieney and accuraey of the ST3020 system in the audio power amplifiertest are verified, and the perforance evaluation and quality control of the audio amplifier are reliablysupported.This study provides an important reference for the application of automated testing technology inaudio equipment testing.