The utility model relates to an underground construction device, in particular to a movement guide device of an underground side slot-forming construction device. A lifting lead rail of an underground side slot-forming construction device is connected on a locking pipe and includes a plurality of tracks; the track is a box track and includes an arc plate as well as a slot-shaped table-flap; the arc plate is adhered on the wall of the locking pipe; the two ends of the slot-shaped table-flap are connected at the two ends of the arc plate; the underground side slot-forming construction device includes two end plates which are all provided with a corresponding through hole and are sealed at the upper end and the lower end of the arc plate and the slot-shaped table-flap; a joint and a flange which are respectively arranged on the two end plates; the two ends of the slot-shaped table-flap are also respectively provided with a connection plate provided with a pin hole; the channels of each track are connected together for forming a lead rail by the joint and the flange and penetrate the pin hole of the connection plate for locating by utilizing a locating pin. The movement guide device of an underground side slot-forming construction device has a simple structure, can lead an underground side slot-forming device to successfully lift in a pit and ensure the accurate accomplishment of the underground side slot-forming work.