The invention discloses a self-restoring micro-fluid inertia power switch device, which comprises a gallium-indium metal liquid drop, a poly(N,N'-dimethylacrylamide) (PDMA) base, a glass cover board, a liquid drop storage pool, a rectangular micro-channel, a U-shaped micro-channel and metal electrodes, wherein the liquid drop storage pool, the U-shaped micro-channel and the rectangular micro-channel are arranged on a polymethyl methacrylate (PMMA) plate; the metal electrodes are bonded on the glass cover board; the gallium-indium metal liquid drop is initially located in the liquid drop storage pool; and when the inertia force on a switch is greater than the threshold of a passive valve, a metal liquid breaks through the passive valve and enters a micro-channel electrode, and the switch is connected. The liquid flows to a cutoff passive valve in the U-shaped micro-channel at most; when the inertia force disappears, a capillary force difference of the liquid exists between two ends of the micro-channel, so that the liquid automatically flows to the initial position, and the property of the switch is restored. The self-restoring micro-fluid inertia power switch device disclosed by the invention is simple in structure, stable and reliable in contact; and compared with an existing micro-fluid inertia switch, the switch has self-restoring capability, and can be used for a plurality of times.