The utility model relates to a portable mobile maintenance power supply which comprises a charging input unit, an energy storage unit and an electric power output unit which are sequentially connected in series. The charging input unit comprises a general charging module, a solar charging module and a hand-generator charging module which are connected in parallel, and a first change-over switch, a second change-over switch and a third change-over switch are connected between the three charging modules and the energy storage unit respectively. The energy storage unit is a lithium ion battery pack formed by connecting a plurality of lithium ion cells in series; the electric power output unit comprises a DC-AC power module and a DC-DC power module which are connected in parallel; and the lithium ion battery pack is further connected with a power monitoring module. The portable mobile maintenance power supply has the advantages of being convenient to carry, multiple in function, convenient to operate, wide in application range and high in universality.