The invention discloses an electric cable laying device comprising a chassis device, a running device arranged on a bottom part of the chassis device, a mechanical arm structure arranged on the chassis device, a first driving device arranged on the chassis device, a control module arranged on the chassis device, wherein the mechanical arm structure is used for grasping or discharging an electric cable roll, and the first driving device is used for driving the grasped electric cable roll to rotate; the running device, the mechanical arm structure and the first driving device are electrically connected with the control module. Via the electric cable laying device, automatically loading, transporting, wind-up operation and pay-off operation of the electric cable roll can be realized; operation efficiency can be improved, and operation difficulty can be lowered.