This　paper　investigates　analytical　solutions　for　steady　water　inflow　into　a　subsea　grouted　tunnel.　The　relevant　parameters　include　the　pore　pressure　distribution　in　the　aquifer,　external　water　pressure　on　the　grouted　zone　and　water　inflow.　Analytical　solutions　are　obtained　by　the　complex　variable　method　(CVM),　mirror　image　method　(MIM)　and　axisymmetric　modeling　method　(AMM).　A　series　of　numerical　simulations　are　performed　to　validate　the　analytical　solutions.　The　calculation　accuracy　and　application　conditions　of　each　method　are　stated　by　comparisons　of　the　pore　pressure　distribution　and　water　inflow.　Finally,　the　influencing　factors,　such　as　the　boundary　conditions,　permeability　of　grouted　zone　and　water　depth,　are　discussed.　It　is　suggested　that　the　width　of　the　lateral　boundary　should　be　at　least　nine　times　the　tunnel　diameter　when　conducting　a　numerical　simulation　for　the　steady　seepage　field.　The　relative　permeability　(i.e.,　k,/k　g　)　has　influences　on　comparisons　between　the　analytical　solutions　and　numerical　solution,　but　the　results　remain　in　an　acceptable　range.　It　is　also　found　that　both　the　external　water　pressure　on　the　grouted　zoo　and　water　inflow　increase　linearly　with　the　rising　of　the　water　table.