An energy management method and a management circuit for a friction nano power generator, and a device comprising the management circuit. The energy management method comprises: temporarily storing electric energy output by a friction nano power generator in a temporary energy storage device (S201); and transferring the electric energy temporarily stored in the temporary energy storage device to an energy storage device (S202). By means of the technical solution, by periodically charging and discharging a temporary energy storage device, the charging of an energy storage device is realized, impedance matching of a friction nano power generator and the energy storage device is realized, and the energy storage efficiency is greatly increased, thereby being able to efficiently convert alternating current energy generated by the friction nano power generator into constant-voltage direct current for output.
