Hedgehog is the earliest plastic way, which can be divided into single stem plastic surgery and multi-main vine fan plastic surgery. The specific method is: when planting, insert a bamboo pole next to each young tree as a bracket, select three stout and full branches, leave 1 upright branch to lure it to extend to the upper iron wire, and tie the other two branches to make it extend to the left and right along the iron wire. When the upright branches extend to the second layer of wire, the pruning branches branch again to make them extend horizontally to the left and right respectively. The double-arm three-layer transverse shape has one more layer than the double-arm two-layer transverse shape, and its shaping method is the same. However, due to the low yield of hedge frame shaping, it was gradually replaced by the subsequent T-shed frame in mass production.