Rain　infiltration　through　the　soil　is　the　critical　factor　in　the　frequent　landslides　on　the　coast　of　China.　By　considering　the　geological　disaster　points　of　Dehua　County,　Quanzhou　City,　Fujian　Province　as　the　main　research　object,　the　permeability　characteristics　of　slope　soil　and　granite　residual　soil　are　concerned　in　these　typical　geological　disaster　points.　The　one-dimensional　soil　column　infiltration　test　was　carried　out　using　the　soil　infiltration　device　developed　by　simulating　rain　intensities　of　15,　30　and　60　mm/h,　respectively,　with　the　rainfall　conditions　of　duration　(180　min)　and　amount　(90　mm).　The　response　law　of　moisture　content,　wetting　front　and　infiltration　rate　of　each　soil　column　with　time　under　different　working　conditions　was　investigated.　The　main　results　are　presented　in　detail.　The　soil　wetness　spreads　deeper　and　faster　as　the　permeability　coefficient　of　soil　and　the　rainfall　intensity　become　greater.　The　soil　moisture　content　responds　to　rainfall　from　shallow　to　deep　part　during　the　process　of　rainfall　infiltration.　Meanwhile,　the　influence　of　different　rain　intensities　on　water　content　is　mainly　reflected　in　the　first　response　time　and　saturation　time.　The　high　intensity　of　rain　leads　to　short　response　time　and　a　quick　saturation　speed.　A　function　is　proposed　for　different　rainfall　intensities,　which　can　characterise　the　wetting　front　infiltration　laws　of　the　Maping　landslide　and　the　Bengtuling　landslide　in　Dehua　County.　The　results　are　of　great　significance　for　the　early　warning　of　landslide　hazards.　©　2020,　Science　Press.　All　right　reserved.