Objective To explore the level and difference of the gender

grade and major of the behavior puzzle of interpersonal relationships of college students. Method By the Interpersonal Relationships Questionnaire

a sample of 700 college students selected from three northeastern universities at random were tested. Results The moderate grade of the behavior puzzle of interpersonal relationships of college students. makes up 35.43 %

and the severe one makes up 9.28 %; there are significant differences between or among gender

major and grade of the behavior puzzle of interpersonal relationships of college students（t=2.54

p<0.05;F=5.32

p<0.01;F=3.44

p<0.05）. Conclusion There exists the middle level of the behavior puzzle of interpersonal relationships when college students communicate with the others.