The　seepage　phenomenon　of　water　in　multi-layered　unsaturated　soils　is　ubiquitous　in　natural　environments　and　engineering　practices.　To　accurately　describe　the　one-dimensional　transient　seepage　behavior　of　water　in　the　two-layered　unsaturated　soil　under　a　time-varying　rainfall　scenario,　based　on　the　exponential　soil-water　characteristic　curve　and　permeability　coefficient　function,　the　corresponding　analytical　solutions　are　derived　for　the　first　time　via　the　approach　of　variable　substitution,　separation　variable,　and　Fourier　series　transformation.　The　solutions　also　account　for　the　arbitrary　initial　water　content　distribution　and　two　types　of　bottom　boundary.　On　this　basis,　the　correctness　of　the　proposed　analytical　solutions　is　validated　by　comparing　them　with　existing　two　analytical　solutions　and　corresponding　numerical　solutions.　Finally,　taking　the　simplified　two-layered　soil　cover　as　an　example,　the　one-dimensional　transient　seepage　laws　of　water　in　the　two-layered　unsaturated　soil　are　analyzed.　The　results　indicate　that,　for　the　same　total　rainfall,　water　storage　in　the　cover　is　smaller　and　cumulative　leakage　CQb　is　larger　under　the　＂previous-peak＂　rainfall　pattern,　while　the　opposite　occur　under　the　＂post-peak＂　pattern.　Compared　to　the　case　where　the　soil　cover　with　a　smaller　saturated　permeability　coefficient　is　located　above　the　two-layered　cover,　the　corresponding　water　storage　is　larger　and　the　value　CQb　is　smaller　when　it　is　located　below.　When　the　initial　total　water　storage　is　the　same,　the　larger　volumetric　water　content　at　the　bottom　zone,　the　smaller　water　storage　in　the　cover　after　a　period　of　rainfall,　and　the　larger　value　of　CQb.　A　larger　initial　effective　saturation　of　the　cover　Sini　leads　to　a　larger　value　of　CQb　during　the　rainfall,　and　at　the　same　time,　the　value　of　CQb　increases　linearly　with　an　increasing　Sini.