Biological　synapses　were　the　basic　structure　for　information　transmit,　which　also　perform　key　computation　functions　in　neural　circuits.　Such　functionality　inspires　artificial　intelligence　to　mimic　human　brain,　which　has　10(15)　synapses　and　consumed　only　similar　to　1-100　fJ　per　synaptic　event　during　massively　parallel　information　processing.　It　thus　indicates　that　artificial　synapse　devices　with　low　power　consumption　are　highly　desired　to　mimic　human　brain.　In　this　work,　we　developed　a　distinctive　structure　of　self-powered　synapse　transistor　to　emulate　synapse　functions,　and　the　voltage　was　provided　by　a　triboelectric　nanogenerator　(TENG)　without　using　additional　voltage　to　generate　pre-synapse　spike.　Moreover,　TENG　could　simultaneously　function　as　tactile　sensor　to　realize　self-powered　tactile　synapse　with　simple　device　structure.　The　essential　synaptic　functions　such　as　excitatory　postsynaptic　current　(EPSC),　paired-pulse　facilitation　(PPF),　dynamic　filtering,　and　short-term　plasticity　(STP)　to　long-term　plasticity　(LTP)　were　demonstrated　in　the　self-powered　synapse　transistor　devices　by　touching　the　TENG.　Moreover,　the　logic　gate　＂AND＂,　and　＂OR＂　were　achieved　using　TENG5　as　multiple　pre-synaptic,　and　tactile　study　was　also　mimicked.　The　integration　of　TENG　and　synapse　transistor　device　has　great　potentials　in　the　applications　of　novel　e-skin　devices　for　artificial　intelligence　and　human-computer　interaction.