The　widely　distributed　reciprocating　compressors　contain　abundant　vibrational　energy,　and　it　is　valuable　to　effectively　harvest　the　mechanical　vibration　energy.　However,　the　traditional　vibration　energy　harvesters　have　shortages　of　a　single　harvesting　direction　and　insufficient　output　under　weak　vibration　excitation.　Here,　a　two　degrees　of　freedom　in　two　directions　structure　triboelectric　nanogenerator　(TFTD-TENG)　was　proposed.　TFTD-TENG　can　efficiently　harvest　the　vertical　and　horizontal　or　composite　directions　vibration　energy,　and　the　additional　solar　cell　(SC)　on　the　TFTD-TENG　can　harvest　static　solar　energy.　To　clarify　its　working　principle,　the　kinematic　characteristics　and　the　mechanical　models　of　the　TFTD-TENG　in　horizontal　and　vertical　directions　were　analyzed.　Moreover,　the　main　structural　parameters　were　optimized.　The　vertical　and　horizontal　output　performance　of　the　TFTD-TENG　at　vibration　frequencies　of　1-25　Hz　and　vibration　amplitudes　of　1-3　mm　were　comprehensively　tested.　For　the　composite　vibration　direction,　a　vibration　direction　recognition　method　based　on　the　output　voltage　ratio　was　proposed.　When　the　TFTD-TENG　was　installed　on　an　air　compressor,　the　output　voltage　of　the　vertical　TENG　was　192　V　and　the　short-circuit　current　(I-sc)　was　8　mu　A,　the　output　voltage　of　the　horizontal　TENG　was　83　V　and　the　I-sc　was　5　mu　A.　And　when　the　TENG　units　in　two　directions　output　in　parallel,　the　TFTD-TENG　can　generate　a　maximum　power　of　1361.25　mu　W,　matching　a　resistance　value　of　20　M　Omega.　The　proposed　TFTD-TENG　shows　excellent　performance　in　vibration　energy　harvesting　and　self-powered　sensing,　which　has　great　prospects　in　smart　factories　and　artificial　intelligence　of　things.