Highway subgrade widening and reinforcing structure

The utility model discloses a highway subgrade widening and reinforcing structure which comprises an original subgrade structure and an original pavement structure on the original subgrade structure, and a plurality of steps are dug from bottom to top along the original subgrade structure and one side or two sides of the original pavement structure in the thickness direction to form a step junction surface; a plurality of anchoring rods are longitudinally arranged on each step of the step joint surface along the length of the road, the anchoring rods on the same step are fixedly connected into an integral structure through transverse connecting pieces, and the anchoring rods on the same vertical plane on the adjacent steps are fixedly connected into an integral structure through longitudinal connecting pieces; one side or two sides of the original roadbed structure and the original pavement structure are correspondingly widened to form a widened pavement structure and a widened roadbed structure, the widened