The containerized energy storage transformer ingeniously integrates energy storage and voltage transformation functions into a container - type cabinet. The cabinet is made of high - strength and corrosion - resistant materials, with excellent protection performance, and can adapt to complex outdoor environments. The internal integration of efficient energy storage units and advanced voltage transformation devices can realize rapid energy storage and stable voltage transformation output, effectively improving the peak shaving and frequency modulation capabilities of the power system, and providing reliable support for new energy consumption, emergency power supply of the power grid and other scenarios. It is an important equipment to promote the construction of a new power system.