The invention discloses a planting method for intercropping mulberry in a mulberry orchard. The method adopts mulberry-mulberry intercropping. The planting method comprises the following steps: in thesecond spring after conventional planting of the mulberry, intercropping multicaulis grafts or hybridized mulberry or performing mulberry seedling cultivation among rows of the mulberry. Practice proves that high yield and good harvest of a newly-built mulberry orchard can be realized in the year of mulberry-mulberry intercropping. According to the invention, the gap and light energy utilizationrates of the mulberry orchard can be effectively improved through mulberry-mulberry intercropping; and the total branch number per unit area and the total branch length are greatly increased, so a population structure foundation is laid for improvement of leaf yield. According to experimental results, the annual leaf yield can be increased by 30% or above through mulberry-mulberry intercropping.