The invention discloses a lithium ion battery energy storage power station comprising a plurality of energy storage sets which are connected in parallel through a low-voltage bus, low-voltage protective devices connected in series with the plurality of energy storage sets connected in parallel, voltage transformation devices with primary sides connected in series with the low-voltage protective devices; and medium-voltage protective devices with one ends connected with the secondary sides of the voltage transformation devices and with the other ends connected with a high-voltage bus. By means of reasonable topology, the lithium ion battery energy storage power station prevents uncontrollable loop circulation caused by direct parallel connection of a battery pack, and achieves quick response at a millisecond level in order to deal with voltage disturbance.