The invention relates to a cable rack, in particular to a glass fiber-prepared rail cable rack, which comprises a horizontal rotating seat, vertical columns, a top seat, a hinge seat, a connecting rod, a long stop lever, anti-skid sheets, spacing plates, rack columns, fastening screws I, lifting blocks and inclined connecting rods II. Cable erection is reliable, and cable disassembly is facilitated. The two vertical columns are fixedly connected to the upper side of the horizontal rotating seat; the top seat is fixedly connected between the upper ends of the two vertical columns; the upper part of the top seat is fixedly connected with the hinge seat; the lifting block is vertically connected to the vertical column in a sliding manner; the lifting block is in threaded connection with the fastening screw I; the fastening screw I abuts against the vertical column; the inclined connecting rods II are hinged to the front side and the rear side of the lifting block correspondingly; the rackcolumns are hinged to the front side and the rear side of the hinge seat correspondingly; a plurality of spacing plates are fixedly connected to the upper sides of the two rack columns correspondingly; the anti-skid sheets are fixedly connected to the upper portions of the spacing plates correspondingly; and a connecting rod is fixedly connected to the upper end of the hinge seat.