Objective To probe into the differences in health and family function between left-behind children and non-left-behind children and the relationship between health and family function.Method 311 left-behind children and 351 non-left-behind children were surveyed with self-rating health scale and family adaptability and cohesion scale.Results The average score of self-rating health scale was（7.03±1.14） and that of family adaptability and cohesion scale was（3.12±0.62）.differences in the dimensions of "psychological symptom and negative emotion" between left-behind children and non-left-behind children were statistically significant（t=-2.04

p<0.05） and left-behind children had more negative emotions;differences between other health dimension and family function had no statistical significance;it was found through regression analysis that family function had a significantly positive influence on physiology

psychology and social symptoms（F=23.93

63.51

81.71

p<0.01）.Conclusion People should pay attention to the aspect such as negative emotion of this group and take care of them

and improvement of family function can improve their health.