The system is mainly used for the treatment of landfill leachate, including three-level system. The features of the system are that ASBR and SBR units can automatically carry out four cycles of water inlet, aeration and agitation, sedimentation and water outlet. The whole system can realize 24-hour unattended operation, equipped with online monitoring instruments, which can automatically record data, generate reports, etc. The treatment capacity is 20L / h. The primary system consists of grid, coagulation sedimentation unit and automatic dosing device; the secondary system consists of two groups of ASBR, one group of SBR, two-stage electrolytic oxidation and vertical flow sedimentation; the tertiary system mainly consists of membrane separation, including ultrafiltration and nanofiltration unit. According to the design of landfill leachate, the system fully considers the experimental conditions and water quality requirements in the selection of reactor materials, instruments and equipment, so as to ensure the safety, durability, accuracy and beauty of the device