The invention relates to a crystal particle crystal boundary performance test electrode for ceramic material and a test method thereof, in particular to a test electrode; the test electrode is provided with a calibrated ring, a base electrode and a directed graph, the base electrode is arranged on the calibrated ring, the base electrode is formed by leading out filaments along the horizontal, vertical and diagonal directions by a round electrode, and the round electrodes are distributed in an array way, the directed graphs are arranged at the periphery of the base electrode; CuO-riched ceramic material powder is prepared and is pressed into ceramic wafers in a dry way, temperature insulation and surface treatment are carried out to obtain the ceramic surface with clear crystal boundary, and the electrode is prepared on the surface; I-V characteristic measurement is carried out, the single crystal is prepared without complex process, measurement, comparative analysis of late-time data and later-stage repetition experiments are convenient, the measurement can be carried out by virtue of an optical microscope without using expensive probe and AFM, the distance among the filaments can be regulated according to the sample distance, and the measurement of all formulas is convenient.