Harvesting　the　vibration　energy　commonly　found　in　engines,aircompressors,　and　other　machines　is　of　great　significance　for　energyrecovery　and　reutilization.　However,　due　to　the　small　vibration　amplitudeand　non-single　vibration　directions,　the　conventional　vibration　energyharvesters　based　on　triboelectric　nanogenerators　(TENGs)　have　a　lowefficiency.　In　this　work,　we　proposed　a　TENG　with　a　rotational　freestandingmode　(RFM-TENG),　which　can　effectively　harvest　the　mechanical　vibrationenergy　with　a　small　amplitude,　high　frequency,　and　multiple　directions.The　working　principle　and　performance　characteristics　of　each　TENGunit　were　demonstrated　through　theoretical　analysis　and　electricalsimulations.　To　further　improve　the　harvest　efficiency,　we　prepareda　room-temperature　vulcanized　silicone　rubber　(RTV)　film　doped　withhigh　dielectric　constant　halloysite　nanotubes　powder　as　the　triboelectriclayer,　which　increased　the　open-circuit　voltage　by　100%　and　the　short-circuitcurrent　by　85%　at　an　optimal　doping　ratio　of　7　wt　%.　When　the　RFM-TENGwas　installed　on　an　air　compressor,　it　generated　an　open-circuit　voltageof　about　60　V　and　a　maximum　output　power　of　45　&　mu;W　and　allowed30　commercial　LEDs　to　light　up　simultaneously.　RFM-TENG　has　the　advantagesof　strong　nonlinearity,　high　sensitivity,　and　multi-directional　responseand　has　potential　applications　in　the　field　of　smart　factory　and　digitaltwin.