Study　Region:　Beijing　Study　focus:　Urbanization　has　altered　the　processes　of　the　hydrological　cycle　in　cities,　further　affecting　their　precipitation　extremes.　This　study　utilizes　Weather　Research　and　Forecasting　model　(WRF)　to　investigate　the　sensitivity　of　extreme　precipitation　to　urbanization,　exemplified　by　analyzing　the　＂23.7＂　extraordinary　rainstorm　in　Beijing.Two　comparative　urban　development　scenarios　(1980　and　2020)　were　designed,　using　the　real　underlying　surface　as　the　static　geographic　data　for　the　WRF　model.　Furthermore,　the　reliability　of　the　model　results　was　validated　through　an　analysis　of　the　extreme　precipitation　event　that　occurred　in　July　2021,　reinforcing　the　findings　of　this　study.　New　Hydrological　Insights　for　the　Region:　The　simulated　precipitation　is　well　represented　by　using　the　underlying　surface　data　post-urbanization.　Furthermore,　the　study　reveals　that　urbanization　has　augmented　the　total　rainfall　of　two　extreme　precipitation　events　in　Beijing:　the　＂23.7＂　event　and　the　event　on　July　12,　2021.　Specifically,　there　was　an　increase　of　19.1　mm　and　7.1　mm,　respectively,　in　the　rainfall　within　the　core　urban　area　during　these　two　extreme　precipitation　events,　when　comparing　the　underlying　surface　scenarios　from　1980　to　2020.　Analyzing　the　impact　mechanism,　weakened　horizontal　winds　in　the　urban　core　prolong　water　vapor　residence,　altering　land　surface　energy　balance　to　boost　temperature　and　convection,　both　contributing　to　urban-induced　precipitation　increase.