The　near-field　wave　problem　of　the　saturated　soil　involves　the　energy　radiation　effect　of　the　truncated　infinite　media.　A　viscous　spring　boundary　is　proposed　for　the　fluid-saturated　porous　media.　Based　on　the　process　of　wave　propagation　under　internal　point　source,　the　stress　and　flow　velocity　boundaries　are　constructed　by　reasonable　assumptions　of　outgoing　waves　and　Green＇s　function,　respectively.　Without　the　permeability　assumption,　the　proposed　boundary　avoids　the　low　accuracy　caused　by　the　assumption　of　zero　permeability　that　is　widely　used　in　the　existing　methods.　The　boundary　simultaneously　has　a　simple　form,　clear　physical　meaning,　and　less　computational　cost　due　to　its　local　character.　Meanwhile,　a　completely　explicit　integration　algorithm　considering　the　damping　is　constructed　to　solve　the　finite　element　equations　of　saturated　porous　media　with　the　proposed　boundary.　The　accuracy　and　high　computational　efficiency　of　the　wave　numerical　method　are　verified　in　the　examples.