The utility model discloses a ground wire digital monitoring device for spanning construction. The device comprises a monitor and a protective net, the two sides of the protective net are connected with the tower poles on the two sides through protective net force bearing ropes. The tower top of the tower rod is connected with the protective net through an anti-falling control rope. A counter-pullcontrol rope is arranged on the other side of the tower pole; outward pulling control ropes are arranged at four corners of the protective net; laser observation plates are symmetrically arranged below the protective net on the tower pole; monitors are arranged on the protective net, the protective net force bearing rope, the anti-falling control rope, the reverse pull control rope and the outward pull control rope; the monitor transmits monitored data to a control terminal of a construction site and a remote control terminal in a remote control room in a wireless transmission mode. The control terminal and the remote control terminal are respectively provided with a central processing unit, the central processing units are respectively connected with a displayer, an alarm, an interphoneand a keyboard, and the control terminal is connected with the remote control terminal in a wireless mode. According to the utility model, the construction safety and the construction quality can be effectively guaranteed.