There are significant differences on the constitutional status between children and adults due to the special physiological and pathological characteristics. The common status of biased constitution include qi deficiency,yang deficiency,phlegm dampness,stagnation,liver fire,predominant heat,hypersensitivity and cowardice. And it also expounds the definition description,main manifestation,unhealthy tendency and mechanism explanation. It is considered that the research development of children constitution is of positive significance for the prevention and treatment of diseases and the maintenance of their normal growth and development.