[Objective]The research aimed to study the optimum extraction technology of gallic acid from flos rosae rugosae. [Methods]The best extraction condition was screened by orthogonal experiment according to the content of gallic acid. [Results]The optimum conditions was as fol1ows:100 ℃,for 3 h and solid-liquid ratio was 1∶30. [Conclusions]The extracting method was brief and quick. It provided a way for extracting gallic acid from flos rosae rugosae.