Landfill leachate collection and treatment system

The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate collecting and treating system, which comprises a vacuum collecting unit, a liquid collecting unit and a liquid collecting unit, the collection and detection unit is used for carrying out corresponding parameter detection on various parameters of the collected leachate; the treatment unit is used for carrying out various biochemical and microbiological treatments on the collected leachate; and the treatment detection unit is used for carrying out related detection on various parameters of the leachate treated by the treatment unit. A central control unit, determining whether a system malfunctions or controlling related devices to adjust the flow rate according to the concentration of dissolved oxygen detected by a collection detection unit and the flow rate of output percolate, and determining whether ammonia nitrogen conversion is completed according to the nitrogen content of percolate detected