The invention provides a double-electrolytic-cell device for micro-area electrochemical test and a using method thereof. The device comprises a hydrogen charging mechanism, a micro-area electrochemical testing mechanism and a gas collecting mechanism, and the hydrogen charging mechanism comprises a hydrogen charging cell, an observation mirror, a liquid inlet, a top plate, a hydrogen charging hole, an auxiliary electrode, a reference electrode, a lower sealing ring and an upper sealing ring; a sample is arranged between the lower sealing ring and the upper sealing ring, a hydrogen filling solution is loaded in the hydrogen charging cell, and the hydrogen filling solution is in contact with the lower surface of the sample; the micro-area electrochemical testing mechanism comprises an electrochemical workstation, a detection pool, a detection hole, a micro reference electrode and a platinum electrode probe; the detection pool is fixed on the top plate, and a hydrogen charging hole of thedetection pool is opposite to a detection hole of the detection pool; and when the sample is filled with hydrogen, the gas collecting mechanism discharges bubbles on the lower surface of the sample.According to the invention, a double-electrolytic-cell structure is adopted, preparation and installation processes of an experimental sample are simplified, hydrogen charging and in-situ micro-area electrochemical testing of the sample are realized, and application of the scanning electrochemical microscope in the field of hydrogen permeation research is expanded.