【Objective】 To explore the psychological and behavioral characteristics,temperament traits and family environment of children with functional constipation and provide basis for precaution and psychological intervention. 【Methods】 Achenbach Children Behavior Checklist(CBCL),Children Temperament Scale,Family Environment Scale-chinese version (FEV-CV) and hyperactivity behavior checklist for 106 children with functional constipation and 212 normal children were selected to investigate children's parents. 【Results】 1) Incidence rate of behavior problems in the case group(22.64%) was higher than in the control group(12.26%)(P<0.05).Somatic complaint,immaturity,aggressiveness of boys and social withdrawal,depression,obese,schizoid state of girls with functional constipation were higher than those of normal ones from 4 to 5(P<0.05).Depression,offensive behavior,restless behavior,aggressiveness of boys and offensive behavior,somatic complaint,disobedience of girls with functional constipation were higher than those of normal ones from 6 to 11(P<0.05).2)The scores in their temperament test of rhythmicity,adaptability,persistence,distractibility of children with functional constipation were lower than those of normal children (P<0.05).3)In scores of family environment,cohesion,intellectual-cultural orientation,independence and control were lower than those in control group and conflict was higher than it(P<0.05). 【Conclusion】 Incidence rate of behavior problems in children with functional constipation was much higher,they have particular temperamental characteristics and living in relatively unhealthy family environment should thus be administered.