Objective:The aim of this study is to investigate the climatic changes on spring phenology impacting on the consultation rate of patients with allergic rhinitis.Method:We analyzed the periods of full flowering stages of 15 kinds of flowers in Beijing from 2013 to 2014,and the number of patients with allergic rhinitis in the outpatient clinic of Otolaryngology Department of Peking University Third Hospital in the same time.The correlation test, analysis of variance and rank sum test were used to investigate the inherent laws and associations between the full flowering stages and the ratio of patients with allergic rhinitis.Result:①Between 2013 and 2014,the early and middle April were the full flowering stages of Platycladus orientalis,Salix matsudana, Fraxinus chinensis,Elms and Birches.The number of patients with allergic rhinitis in outpatient clinic elevated obviously in this period.②There were overlaps of full flowering stages among different plants.During periods in which three or more kinds of pollens in full flowering stages,the consultation rate of patients with allergic rhinitis is higher than less overlaping flower period.The difference was statistically significant(F value were -2.281,-2.964 respectively, P <0.05).Also,there were obvious positive linear correlations between the number of overlap of different pollens and the consultation rate of patients with allergic rhinitis in in 2013 and 2014(r=0.957, 0.964 respectively).Conclusion:During the overlaping flower periods,there was a higher consultation rate of patients with allergic rhinitis.In prevention and treatment of allergic rhinitis,the overlapping effect of full flowering stages of different pollens should be taken into account.Upgrade the alarm level will reduce the incidence of AR and the degree of allergic rhinitis episodes.