The test of electro-osmotic drainage of two group was conducted in a self-made test tank.The first test (T1)was aimed at exploring the influence extent of crack which was produced near anode and cathode in process of electro-osmosis on electro-osmotic results.Through the contrast of voltage drop, electrical energy and resistance value consumed at crack of two poles, the paper obtained that the influence of anode cracks on electro-osmosis is significant stronger than that of cathode cracks;on which basis, the second test (T2) pretreated the anode cracks by conductive fine powder of activated carbon.By comparing drop consumption, electricity consumption, test displacement and final moisture content of the soil of T1 and T2 in the vicinity of anode voltage,it explored the feasibility of anodic crack treatment, and obtained the preliminary conclusion of anode crack treatment.That the method used activated carbon to pretreat anode cracks was conducive to discharge of water body in the process of electro-osmosis. In short time of test, the energy consumption of anode of soil body by adding activated carbon is greater than that of the fracture.