Intelligent test system and method for 220kV zinc oxide arrester without disassembling lead

The invention discloses an intelligent test system and method for a 220kV zinc oxide arrester without disassembling a lead. The intelligent test system comprises the 220kV zinc oxide arrester, a pressurization module, a voltage and current sampling module and a calculation and analysis module, the pressurization module and the voltage and current sampling module are electrically connected with the 220kV zinc oxide arrester, and the calculation and analysis module is electrically connected with the pressurization module and the voltage and current sampling module; the pressurization module outputs amplitude-adjustable direct-current voltage to carry out pressurization treatment on the upper section and the lower section of the 220kV zinc oxide arrester; the voltage and current sampling module is used for measuring the DC voltage output by the voltage increasing module, the sum of the leakage currents throttled up and down by the 220kV zinc oxide lightning arrester and the leakage current throttled down by the