Pressure　and　flow　ripples　in　integrated　energy　recovery-pressure　boost　devices　(IERPBD)　for　seawater　reverse　osmosis　(SWRO)　systems　induce　detrimental　vibrations,　noise,　and　accelerated　degradation　of　critical　components　(e.g.,　reverse　osmosis　membranes　and　valves).　To　address　this　challenge,　this　study　proposes　a　comprehensive　optimization　framework　combining　numerical　modeling,　structural　redesign,　and　experimental　validation.　A　lumped　parameter　model　of　the　axial　piston　booster　pump　(APBP)　in　IERPBD　was　developed,　incorporating　Monte　Carlo-based　flow　area　calculation　and　simulated　annealing　(SA)　algorithm-driven　optimization　of　port　plate　geometry.　A　novel　2　pressures/2　systems　(2P2S)　method　was　implemented　to　dynamically　characterize　flow　ripples,　achieving　high　measurement　accuracy　and　validating　the　model＇s　fidelity　across　rotational　speeds.　Besides,　an　optimized　port　plate　was　manufactured　based　on　optimization　results.　Experimental　results　revealed　a　14.8　%　reduction　in　pressure　ripple　and　11.2　%　reduction　in　flow　ripple　with　the　optimized　port　plate,　demonstrating　the　efficacy　of　the　SA　algorithm　in　mitigating　hydraulic　pulsations.　Furthermore,　the　study　quantifies　the　diminishing　optimization　efficacy　at　higher　rotational　speeds,　linking　it　to　increased　leakage　dynamics　and　system　resonance　effects.　This　work　establishes　a　validated　methodology　for　improving　SWRO　systems　reliability　through　flow　ripple　suppression,　with　direct　implications　for　energy　efficiency　and　component　longevity.