The present invention discloses a device for a mobile phone. The device comprises a frame body and a slipping connection cavity arranged in the frame body, a plug-in trough is arranged at the upper portion of the left side of the frame body, a transmission assembling unit being arranged in left and right sliding mode and being matchingly connected with an electric connection head connected with a cutting machine is arranged in the slipping connection cavity, the transmission assembling unit comprises a lower slipping connection section and an upper slipping connection section fixedly connected with the lower slipping connection section, the left side of the upper slipping connection section is provided with a first electric connection hole, the right side of the upper slipping connection section is provided with an electric connection column, and the upper slipping connection section is internally provided with a locking device configured to lock the electric connection head. The device for the mobile phone is simple in whole structure, safe and stable to operate, low in cost, convenient to install and maintain and simple to operate, can realize continuity of mobile phone power supply, can avoid disconnection of power supply at half way and is suitable for popularization and application.