Abstract: ObjectiveTo investigate the characters of aggressive behavior and its association with personality and class environment among vocational students.MethodsTotally 414 students from 3 vocational schools in Baoji city completed the aggression questionnaire,the five-factor personality inventory,and class environment inventory.ResultsPhysical attack in the students showed significant gender difference(t=6.09,P<0.001)and verbal attack,anger,and the average score of aggressive behaviors also showed significant grade differences(t=-2.81,P<0.01;t=-2.42,P<0.05;t=-2.27, P<0.05).Physical attack and the average score of aggressive behaviors showed significant differences in family economic conditions(F=7.01,P<0.01;F=3.12,P<0.05).Three distinctive types of class environment were identified(cohesive, average,conflict)and there were significant differences in aggressive behaviors among the three types of class environment (P<0.01).Aggressive behaviors of the students had significant relation to personality and class environment.The neuroticism,consciousness,openness,and agreeableness in personality and classmate relationship in class environment could significantly predicate aggressive behaviors.ConclusionPersonality and class environment could predicate aggressive behaviors and the personality has more important effect than class environment—a regulatory factor for aggressive behaviors among vocational students.