The invention discloses a special coding machine for cables. The special coding machine for the cables comprises a movable coding moving box and a handheld terminal used for controlling the coding moving box; the coding moving box comprises a box body with an opened bottom; a top plate of the box body is provided with a top cover capable of being opened; and the box body is internally provided with a control module, a drive transmission device, an image positioning device and a code spraying device. By adopting the special coding machine for the cables, flexible receiving and releasing of thecoding moving box are realized, and manual flexible code spraying is realized as for space and position limited places; and the coding moving box adopts remote control intelligent control, timely reports obstacle types when encountering various obstacles in the construction site and can timely change a position to cross the coding obstacles for next dynamic coding as before, so that flexible adaptation to the construction site is realized, and the space limitation of cable coding is broken.