The invention provides an auxiliary installation device for a train bottle cable box of a special-shaped train model of a commuter train. According to the auxiliary installation device, wire arrangement operation is more comfortable, faster and safer. The auxiliary installation device comprises a pre-arranging and overturning mechanism, a cable box transferring mechanism and a cable box supporting mechanism which are sequentially used in cooperation. The pre-arranging and overturning mechanism comprises a base. Multiple first wheels are installed below the base. An overturning drive mechanism is installed at the middle portion of the base. An overturning balance mechanism is arranged at each of the two ends of the base. The overturning drive mechanism comprises a transmission case, a handle, a first gear and a second gear. The transmission case is installed on the base. The handle is installed on the transmission case. A power output shaft of the transmission case is in circumferential limiting fit with the first gear, and the first gear is engaged with the second gear. The cable box supporting mechanism comprises a supporting base. Four wheel frames are installed at the lower end of the supporting base. Second wheels are installed on the wheel frames. Multiple supporting sleepers are connected to the supporting base through stand columns, and the supporting sleepers are fixedly connected through sleeper connecting bars.