Abstract:The stream-blanched drying process of Hangzhou white chrysanthemum was optimized.The contents of chlorogenic acid，luteolin and 3，5-O-dicaffeoyl quinic acid were used as evaluation indexes.Response surface methodology was applied to optimize the drying process on the basis of single-factor test.The results showed that the optimum conditions of drying process were：streaming time 80 s，drying temperature 68 ℃，drying time 3.9 h，then moisture regaining 48 h，re-drying temperature 58℃，re-drying time 2.4 h，the comprehensive index of chrysanthemum with the optimized technology was 0.460%，in close agreement with the predictive maximum value within a relative error of 0.44%.