Autonomous　underwater　mobile　platforms　usually　rely　on　cables　or　batteries　for　energy　supply,　which　has　the　problem　of　limited　energy　supply,　which　is　not　conducive　to　the　development　of　distributed　marine　sensing　networks.　Here,　we　designed　a　hydrostatic　pressure　energy　harvesting　triboelectric　nanogenerator　(HP-TENG)　for　harvesting　the　energy　of　the　hydrostatic　pressure　difference　in　the　ocean　to　power　the　underwater　equipment.　HP-TENG＇s　spiral　shaft　drive　design　and　TENG　module　can　convert　differential　pressure　energy　into　mechanical　energy　and　further　into　electrical　energy.　The　HP-TENG　can　generate　an　output　current　of　4.41　μ　A　and　an　open-circuit　voltage　of　26.1　V　at　a　compression　speed　of　4　~cm　/　s,　and　the　total　power　output　in　a　single　compression　process　can　be　significantly　increased　by　changing　the　spiral　angle　of　the　shaft.　In　addition,　the　power　generated　by　the　HP-TENG　can　also　power　low-power　devices,　and　the　generated　energy　at　a　compression　speed　of　2　cm　/　s　can　be　rectified　to　successfully　light　up　20　commercial　LEDs.　The　results　hold　prospects　for　underwater　blue　energy　harvesting　and　are　expected　to　contribute　to　the　development　of　self-powered　equipment　toward　emerging　＇smart　ocean＇　and　blue　economy　applications.　©　2024　IEEE.