The invention discloses a container system and treatment method for leachate treatment. The container system includes a pretreatment system, a membrane filtration device and a guarantee treatment system; the pretreatment system includes an aeration device, a filtration device and a scale inhibition device; and the guarantee treatment system includes a degassing device and an ion exchange device. The treatment method comprises the following steps in sequence: performing pre-treatment: performing interception filtration on a sulfide, suspended matter, a colloid and organic matter in a leachate,and changing crystal forms of calcium and magnesium ions in the leachate; performing interception treatment: performing interception filtration on pollutants in the leachate; and performing guaranteetreatment: removing acid gases in the leachate and performing position interchange on ammonium ions. The container system and the method can effectively remove and control the high-concentration sulfide and suspended matter and scales of inorganic ions such as calcium and magnesium in the leachate, and effectively intercept and filter most of the pollutants in the leachate; and at the same time, the container system and the method remove the soluble acid gases and residual ammonia nitrogen in water produced from the membrane system to make the water reach the standard.