The invention provides a diploprora championii fast seedling forming method, and belongs to the field of arethusa germplasm resources regeneration. According to the method, diploprora championii capsules are collected; under aseptic conditions, bud induction and proliferation rooting are performed; meanwhile, induced culture is completed; transplantable diploprora championii young seedlings are obtained. The arethusa two-step seedling forming method solves the production problems of long culture period, high cost and the like, and simultaneously solves the problems that in the prior art, sources of some precious arethusa resources are difficult to obtain; the plants grow on tree trunks of mountainous region forests with the altitude being 250 to 1450 meters or on ravine rock, and have theharsh requirements on the environmental conditions; the wild resources are few; the ornamental effect is good; the natural breeding capability and spreading diffusion capability are low; the natural updating is difficult; the excellent seed seedlings are scarce and the like. The diploprora championii belongs to national grade 2 protection plants, has higher garden ornamental values, and has the important significance on arethusa garden decoration and orchid park decoration.