Taking Aster tataricus as test materials，using HPLC method，the effect of different phosphate content （35,40,45 kg/667m2） on production and effective composition content of Aster tataricus was studied.The results showed that agronomic traits and the content of effective components were significantly affected when phosphate fertilizerwas 40 kg/667m2；the yield of A.tataricus was the highest when the application amount was 45 kg/667m2，but it was not significantly different compared with 40 kg/667m2，so 40 kg/667m2 was the best applicant amount for A.tataricus.