Abstract: This experiment is to find some simple media for Dendrobium formosum seedligs to make media preparation more easyer. Using orchid fertilizer 20-20-20,21-21-21.At the same time,modified Vacin-Went medium(Vacin,E .and Went,F 1922) and 1/2 Vacin-Went medium were used for comparison. After 150 days asepic culture, the results showed that to some extent, medium that contained 1g/l 21-21-21 or 20-20-20 had equal effects on seedling growth, and they could take the place of medium Vacin-Went and 1/2 Vacin-Went to make the preparation of media more convenient.