The　pollution　from　landfills　due　to　the　leakage　of　leachate　is　an　important　source　of　groundwater　contamination.　The　service　life　of　geomembrane　and　high-permeability　leachate　collection　system,　which　play　a　crucial　role　in　the　long-term　effectiveness　of　landfill　liner　systems,　can　be　greatly　shortened　due　to　the　complex　environmental　conditions　of　landfills.　The　one-dimensional　analytical　model　of　contaminant　transport　in　geomembrane　and　compacted　clay　composite　liners　considering　the　service　life　of　geomembrane　and　leachate　collection　system　is　presented.　Influences　of　the　service　life　of　geomembrane　on　contaminants　transport　are　described　by　changing　boundary　conditions.　Effects　of　the　service　life　of　leachate　collection　system　are　achieved　by　the　fluctuated　leachate　head.　An　investigation　into　the　influence　of　geomembrane　and　leachate　collection　system　service　life　on　the　breakthrough　of　the　composite　liner　is　presented.　An　empirical　formula　for　the　prediction　of　breakthrough　time　considering　the　service　life　of　geomembrane　and　leachate　collection　system　is　proposed,　which　may　provide　the　reference　for　the　preliminary　design　of　composite　liners.　The　proposed　solution　can　capture　the　field　observed　data　well.　Both　the　total　flux　and　concentration　are　underestimated　by　about　three　orders　of　magnitude　and　47.5%,　respectively,　compared　to　the　model　that　doesn＇t　consider　the　service　life　of　geomembrane.