Abstract: This study focus on exploring the developmental characteristic of adolescents' interpersonal relations with peer groups,parents,teachers and strangers.The subjects were selected from Beijing,Henan,Chongqing,Hangzhou and Xinjiang,with age from 13 to 18 years old.The results are as follows:Firstly,the level of interpersonal relations of adolescents decrease between the age of 13 and 14,then increase significantly between the age of 14 and 15,and keep steady during senior high school.Secondly,adolescents' interpersonal relations with peer groups are better than the relationships with adult.Moreover,adolescent's interpersonal relations with peer groups of same sex are better than the relationships with peer groups of opposite sex,and the relationships with stranger are better than the relationships with parents and teachers.Thirdly,the level of interpersonal relations of girls is higher than the relationships of boys.Fourthly,there are critical periods in adolescent's interpersonal relations with peer groups of opposite sex.For boys this period appears between the age of 14 and 16,while for the girls this period appears between the age of 14 and 15.During the critical periods,the level of interpersonal relations with opposite sex increase significantly and keep steady after the periods.Besides,the interpersonal relations with peer groups of same sex increases quickly between the age of 15 and 16.Fifthly,adolescent's interpersonal relation with parents decreases significantly between the age of 13 and 14,while increases during the senior high school.Besides,adolescent's interpersonal relation with teachers keeps at a low level.However,There are significant differences on the development of adolescent's interpersonal relations with strangers.Boys' relationships with strangers increases steadily with the increase of age,while girls' relationships with strangers fluctuates during the adolescence.

Key words: adolescent, relationships, developmental characteristics