The invention discloses a cable laying assisting device. One side of a transmission motor is provided with a double-headed reducer; one end of each first transmission shaft is provided with a drivinggear; one end of each second transmission shaft is provided with a driven gear that is engaged with the corresponding driving gear; one side of each second transmission shaft is provided with a lifting device; the input shaft of each screw jack is connected with the corresponding second transmission shaft through a coupling; the upper part of each screw sleeve I is provided with a screw sleeve III; the upper parts of the supporting plates is provided with a rotating device; the rotating device comprises bearing seats II, rotating shafts I, chucks, and a rotating shaft II; the bearing seats IIare fixedly mounted on the upper parts of the supporting plates respectively; the bearing seats II are internally provided with bearings respectively; the rotating shafts I are installed in bearing inner rings inside the bearing seats II respectively; one end of each rotating shaft I is fixedly connected with the corresponding chuck; and two ends of the rotating shaft II are respectively installedinside the chucks at two sides. The cable laying assisting device of the invention is of an integrated structure. With the cable laying assisting device adopted, operation can be completed by one person, so that work efficiency is high; and the lifting device adopts a linkage manner, and the lifting rate of the lifting device is uniform, and therefore, the inclination of a cable reel can be avoided.