The invention discloses an intelligent sensing device of a zinc oxide arrester tester. The intelligent sensing device of the zinc oxide arrester tester comprises a host, a micro printer, a charging socket, a measurement ground terminal, a power supply switch, a touch keyboard, a large-screen liquid crystal display and an input end, wherein the input end comprises a reference voltage input end and a current input end; the current input end comprises an A phase leakage current input end, a B phase leakage current input end and a C phase leakage current input end; the micro printer, the charging socket, the measurement ground terminal, the power supply switch, the touch keyboard, the large-screen liquid crystal display and the input end are mounted on the host. The intelligent sensing device of the zinc oxide arrester tester is simple to operate and convenient to use, and can be used for measuring total current, resistance current, harmonic wave, power frequency reference voltage, active power and phase difference of a zinc oxide arrester; the large-screen liquid crystal display can be used for displaying real waveform of the voltage and the current; through the application of the digital waveform analysis technology, the measurement results are accurate and stable by using anti-interference methods such as a harmonic wave analysis method and a digital filtering method.