The three-phase harmonic analyzer is a power measuring instrument that integrates multi-function measurement. It can measure three-phase voltage, three-phase current, and 1~63 harmonics, and display odd or even harmonics separately in a list or spectrum graph harmonic. The three-phase harmonic analyzer adopts button operation, can automatically switch the range, actual measurement data retention, measurement data storage, realizes large-capacity storage, and can output vector graphics, which is very suitable for electric energy measurement, electricity inspection, power audit and substation maintenance , Relay protection and other differential detection, start-up test site use. It is also suitable for use in various electric power colleges as a training tool and teaching instrument for wiring discrimination. At the same time, it is also suitable for large-scale power-consuming enterprises such as chemical industry, metallurgy, mining and railway.