The invention relates to a method for treating fluoride waste water by cultivating tea trees and belongs to the technical field of waste water treatment. The method comprises the steps that firstly, tea seeds are dipped and then cultivated, after the tea seeds sprout, tea seedlings are selected, the roots of the selected tea seedlings are flushed with deionized water, the tea seedlings are transferred to culture dishes containing a nutrient solution, and after a great number of white absorbing roots grow up on the roots of the tea seedlings, water planting is conducted; then, cement pools which are communicated and separated by channels are constructed, and tea trees are planted and cultivated in the cement pools; finally, fluoride waste water is introduced into the cement pools to be treated, and then detection is conducted. The method has the advantages that a good treatment effect is achieved, the concentration of fluoride in the waste water is lower than 13 ppm, the technology is simple, the operation process is simple, and the needed cost is low.