With　the　rapid　development　of　urban　transportation　in　China,　tunnel　boring　machines　(TBMs)　are　widely　used　in　tunnel　construction.　This　study　focuses　on　the　wear　behavior　of　TBM　disc　cutters,　which　are　crucial　rock-breaking　component.　The　research　analyzes　the　wear　mechanisms　of　disc　cutters,　including　plastic　removal,　brittle　removal,　and　fatigue　wear,　and　reveals　that　plastic　removal　wear　accounts　for　83.7　%　of　the　total　wear.　Based　on　the　dense　core-cavity　expansion　theory,　an　improved　CCS-type　cutting　force　model　is　established,　incorporating　lateral　forces,　stress　distribution　in　the　dense　core　region,　and　complex　cutter　geometry.　By　integrating　the　wear　mechanism,　cutting　wear　trajectory,　and　cutting　force　model,　a　comprehensive　wear　prediction　model　is　developed.　This　model　can　calculate　the　wear　volume,　wear　rate,　and　wear　life　under　multiple　wear　modes,　such　as　uniform　wear,　lateral　wear,　and　flat　wear.　The　model　is　validated　using　data　from　a　TBM　project　in　Guangzhou.　In　softer　rock　strata,　the　proposed　model　improves　prediction　accuracy　by　35　%　and　4　%　compared　with　the　classical　CSM　model　and　other　literature　models,　respectively;　in　harder　rock　strata,　the　improvements　are　7　%　and　2　%.　Additionally,　quantitative　analysis　shows　that　the　cutter　edge　radius　and　rock　uniaxial　compressive　strength　are　the　most　sensitive　parameters　affecting　wear.　The　findings　of　this　study　provide　valuable　guidance　for　cutter　selection,　tunneling　parameter　optimization,　and　wear　prediction　in　TBM-based　tunneling　projects,　contributing　to　more　efficient　and　cost-effective　construction　operations.　©　2025