The invention discloses a method for ecologically planting angelica decursiva in a juglans sigillata forest, and belongs to the technical field of traditional Chinese medicine planting. The method sequentially includes the following steps of firstly, selecting a land and preparing soil, wherein the juglans sigillata forest in a cold and wet area with altitude of 2500 m to 3000 m and gradient of 3 degrees to 30 degrees is selected for planting, juglans sigillata tree age ranges from 5 years to 6 years, and the spacing in rows and spacing between rows of juglans sigillata are 6 m*8 m; secondly, sowing seeds, wherein 2-2.5 kg of angelica decursiva seeds are sown per mu, sowing in lines is adopted in the sowing process, lines are pulled and bottom channels are flattened through shoveling during sowing in lines, channel depth is 3 cm, and the line spacing ranges from 30 cm to 35 cm; thirdly, conducting field management, wherein weeding, topdressing of hole applied fertilizer, seed stack picking and topping, stamen removing, drought resisting and waterlogging preventing are conducted; fourthly, harvesting angelica decursiva. Appropriate growth conditions can be provided for angelica decursiva, land in the juglans sigillata forest can be used for plantation, weeding is achieved for juglans sigillata, juglans sigillata planting cost is reduced, and dual income increase is achieved through juglans sigillata and angelica decursiva.