The invention discloses a cable laying device. The cable laying device comprises a base, cable trays, a cable, a fixing frame, a guide support and a third pulley; three groups of universal wheels are distributed on each side below the base; two supporting columns are symmetrically arranged above the bilateral sides of the left end of the base respectively; supporting frames are fixedly arranged on the bilateral sides of the outer wall of each supporting column respectively; a hydraulic jack is fixedly arranged at the upper end of each supporting column; a supporting groove which is in a circular arc shape is fixedly formed above each hydraulic jack; a rotating shaft is arranged between the two supporting grooves in a straddled mode; the cable trays are arranged in the supporting grooves through the rotating shaft respectively; the upper end of the guide support is provided with a beam; an elastic guide device is fixed in the middle of the bottom surface of the beam; an elastic guide base, a first guide wheel and a spring are arranged in the elastic guide device. According to the cable laying device, the operation is simple, the use is convenient, the height of each cable supporting frame can be adjusted, the friction force in the movement process of the cable is reduced due to a pulley group, and accordingly the labor intensity of the construction personnel is reduced.