Abstract: The children of farmers who worked in city refer to the group of those whose parents have the identity of peasant, the farmland by contract, but are mainly engaged in non-agricultural industries, and take the salary as their main source of income. They are generally the children of 6 to 18 who are at the right age to school. Generally speaking, the mental health of them is worse than that of the urban children. In social cognition, they have a certain discrimination perception, a feeling of relatively depriving and some identity crisis. In emotion and feeling, the imbalance of emotion, tendency of lonely (depression) and feeling of inferiority (self-accusation) are often serious. In social adaption, the social maladjustment, interpersonal tension and sensation, poorer learning adaptability and more behavior problems are obvious. Furthermore, the individual factors, such as gender, age, personality, coping style and life satisfaction, together with the environmental factors, such as factors from family, school and society, are the main influencing factors to their mental health. In addition, the education intervention for them are lack of systematization, which mainly are some qualitative researches. As a result, the broadening of study objects and contents, the improvement of research approaches, and the strengthening of systematic research and theoretical construction are the trends of research in this field.

Key words: children of farmers who worked in city, mental health, mechanism, education intervention