Power failure emergency device for lifts

The utility model relates to a power supply device for lifts, in particular to a power failure emergency device for lifts. The power failure emergency device for lifts mainly solves the technical problem existing in the prior art that when a storage battery adopted by an emergency device needs to be installed in the circuit, installation is inconvenient, the storage battery needs to be moved manually, and wiring is not safe. The power failure emergency device for lifts comprises a case (1), and is characterized in that more than one control switch (2) connected with a lift is arranged on the case, the control switches (2) are connected with a detection unit (3) through lines, and are sequentially connected with a transformation unit (4) and a storage battery (5) through lines, the interior of the case (1) is provided with a cavity, the storage battery (5) is arranged in the cavity, a support frame (6) is arranged outside the cavity, a plurality of drive rollers (7) which can convey the storage battery (5) are