The invention provides a road crossing strut for power grid construction. The road crossing strut for the power grid construction is arranged below a road crossing frame. The road crossing strut for the power grid construction comprises stand columns which is supported on the road surface, a pulling rope which is used for reinforcing the rope stand column and a carrying rope which is connected to the top of the stand column and used for carrying a falling rope of the crossing frame, and the road crossing strut for the power grid construction comprises a plurality of stand columns, the stand columns are distributed at intervals along the road direction, every two adjacent stand columns are connected with each other through the pulling rope, and the height of each stand column is lower than that of the crossing frame and higher than the minimal head requirement of the road. When the rope on the crossing frame is loosened to drop off, the loosened rope can be supported and prevented from further falling through the carrying rope of the road crossing strut not to be contacted with vehicles normally running on the road, the safety potential danger is eliminated, and the accident is further prevented.