Underground device for storage batteries of outdoor integrated machine room

The utility model discloses an underground device for storage batteries of an outdoor integrated machine room. The underground device comprises an underground pit, a battery compartment and a cabinet, wherein parapet walls and a cushion layer of the underground pit are formed by pouring of concrete; the battery compartment is placed in the underground pit, the top of the compartment is flush with the parapet walls, and the battery compartment is made of galvanized steel and coated with paint on the surface; a manhole door is arranged at one end of the battery compartment, and the neck-shaped edge of the manhole door bulges relative to the battery compartment; a vertical cat ladder with four steps is arranged in the battery compartment and located at the manhole door; an wire incoming hole is formed in the top of the battery compartment, is fully welded with a round tube and extends to the cabinet; the cabinet is erected above the battery compartment, the manhole door and the wire incoming hole are located ins