Abstract: Using the clinic data from a hospital in Chengdu and the atmospheric data during that period，the relationship between children respiratory disease and meteorological elements is analyzed．The results show that children respiratory disease has obvious seasonal variation，and the highest in November and December，the lowest in August．Children respiratory disease is inversely proportional to age，the younger，the risk of illness is greater．Boys are more susceptible to respiratory diseases than girls．Children respiratory disease and meteorological elements have close relationship，and meteorological elements have obvious lag on the incidence of respiratory diseases．The effect of cold air is one of the main reasons for incidence increased significantly．By stepwise regression method，the forecast equations are established for four seasons，and divide four grades．The forecast test indicates the forecast equations are good．