Abstract: The invention discloses an environmental protection device with multi-level waterproof piezoelectric conversion of environmental mechanical energy cycle which includes a lower housing, an upper housing, a waterproof mechanism, a lower permanent magnet, a coil mechanism, an upper permanent magnet, and an auxiliary power generator. The waterproof mechanism is a flexible case disposed between the lower housing and the upper housing. The lower permanent magnet is fixedly disposed at the bottom of the first cavity. The coil mechanism is disposed above the lower permanent magnet. The coil mechanism includes a magnetically conductive shell and a coil and fan-shaped magnetic blocks. The lower end surface of the upper housing is provided with an extension block, an upper permanent magnet, and an auxiliary power generator.