Analyzed the nitrogen,phosphorus and potassium combinations acting on the content of caffeic acid,chlorogenic acid,caffeoyl tartaric acid and cichoric acid using soilless culture.The results showed that nitrogen had different effects on contents of four active ingredients.Phosphorus is not applied,high levels of potassium are beneficial to accumulation of effective ingredients.The most conducive to the accumulation of cichoric acid is no P fertilizer,N 450 mg/L,and K 783 mg/L.