Abstract: ObjectiveTo understand family influencing factors of mental health among junior school students to prevent mental diseases and offer reference and basis for improving measures.Methods538 junior school students in Changchun were questionnaired by Chinese Middle School Student's Mental Health Scale,Parent-Child Relationship Test and draft relevant problems and Spss 1310 was used in the data analysis.Results(1)Children in worse economic family were more easier to be hostile,interpersonal relationships tense,depressed,anxious,feeling studying pressure and maladjustment;(2)Chidren in single family had more mental problems such as paranoiac,hostile,tense interpersonal relationships,depressed.maladjustment;(3) There are relationships between parental rearing patterns and mental health of children;(4)The influence factors of middle school students'mental health were mainly parennts'attitude to children,then family economic states and relationship between father and mother.ConclusionThe family environment was an important factor which infuenced the behavioral development of junior school students and should be paid more attention.