The invention provides a medicament capable of preventing and curing snails in dendrobium officinale cultivation and production. The medicament is one or combination of multiple of Chinese ash seeds, Japanese buttercup herb, Japanese dock root and fructus ulmi, and all medicines in the combination are compounded at any ratio. According to the medicament capable of preventing and curing snails has an obvious effect on preventing and curing the snails; an experiment shows that a highest prevention effect for the snails can be 100%, and a longest prevention and cure period can be 30 days. The prevention and cure method is simple and efficient and is free from pollution and environmentally friendly. The medicament capable of preventing and curing snails is especially suitable for facility greenhouse plantation or the organic cultivation of dendrobium officinale. A medicine application method is simple and easy in operation and is especially suitable to use in mass cultivation. The medicament is used for the organic cultivation of dendrobium officinale, so that chemical agent does not need to be used, and a purpose of environment protection and safety and an organic purpose are realized.