In this paper, 3D electro catalytic micro electrolysis technology was used for the pretreatment of landfill leachate. Through the dynamic and static single factor experiment, the change of COD, NH3-N and color three indexes of the three dimensional electro catalytic micro electrolysis equipment were analyzed. Analysis of electrolysis voltage, positive and negative plate exchange period, aeration, infiltration filtrate flow rate and time of electrolysis effect and to determine the trial integrated equipment optimum operating conditions to alleviate the pressure on the follow-up process, reduce cost of unit amount of wastewater treatment, and reduce pollution. The test has acquired the optimal operational parameters of the 3D electric catalytic micro-electrolysis integration equipment, the parameters as such: 90min standing time, 25～30 voltage, 30s electrode switching time,2000L/h aeration rate, 41% COD removing rate, 24% NH3-N removing rate and 60% chroma removing rate. The system is of high removal rate of pollutants.