To investigate the distribution characteristics of TCM (traditional Chinese medicine) constitution of children with RRTI (recurrent respiratory tract infection) in Shanghai，and analyze the related factors of constitution.Methods:After experts' demonstration，the children's constitution questionnaire was designed.A total of 369 children with RRTI were enrolled in the questionnaire.The factors such as birth history，feeding history，diet preference，sleep quality and accommodation were analyzed.Results:1）The ratio of male and female morbidity of RRTI is 1.2:1.Children of 3-6 years old had the highest incidence of RRTI.2）Qi deficiency constitution was most frequent in RRTI，accounting for 42%; 3）Birth history was not related to constitution，while breast feeding，diet preference，sleep quality and accommodation environment were related to constitution (P<0.05).Conclusion:Children with RRTI are more likely to suffer from Qi deficiency constitution.Feeding history，diet preference，sleep quality and accommodation environment are related to constitution.