Seawater　hydraulic　axial　piston　pump　is　the　most　commonly　utilized　core　power　component　in　seawater　hydraulic　transmission　systems.　However,　as　with　traditional　axial　piston　pumps,　the　lateral　force　on　the　piston-slipper　structure　severely　constrains　the　pump＇s　service　life　and　reliability.　Fortunately,　an　integrated-slipper　structure　can　fundamentally　mitigate　this　lateral　force　and　thereby　enhance　the　longevity　of　the　piston　pump.　To　comprehensively　investigate　the　dynamic　characteristics　of　the　integrated-slipper　structure,　this　study　employs　virtual　prototyping　technology　utilizing　ADAMS　and　AMESim　software　to　separately　model　the　dynamic　and　hydraulic　modules　of　an　Integrated-Slipper　Seawater　Hydraulic　Axial　Piston　Pump　(ISHAPP),　followed　by　a　coupled　simulation　within　a　unified　software　interface.　The　simulation　results　demonstrate　that　in　the　conventional　structure,　the　lateral　force　acting　on　the　piston　exhibits　periodic　variation　between　-500　N　and　500　N　(with　negative　sign　indicating　direction).　However,　with　the　implementation　of　an　integrated-slipper　design,　the　previous　lateral　force　acting　on　the　piston　is　distributed　between　both　the　piston　and　connecting　rod.　Consequently,　there　is　now　a　reduction　in　lateral　force　experienced　by　the　piston　to　values　ranging　from　-180　N　to　300　N.　The　integrated-slipper　structure　effectively　mitigates　the　impact　of　lateral　forces.　The　ISHAPP　virtual　prototype　facilitates　the　investigation　of　dynamic　characteristics　across　the　entire　pump,　and　provides　valuable　guidance　for　innovation　and　advancement　in　seawater　hydraulic　piston　pumps.　©　2023　IEEE.