In this study was aimed to determine the preschool teachers' perception and intervention strategies of physical, relational aggressive behavior and investigate the whether preschool students' this aggressive behavior differ based on preschool teachers' intervention strategies. Sample group consisted of 42 pre-school teachers and 755 preschool students aged 4-5. Sequential explanatory design of explanatory design model, one of the mixed method designs, was used in the study. In the quantitative part of study relational screening model and the qualitive part of study semi-structured interview was used to assess teachers' perception and intervention. Personal Information Form, Pre-School Social Behavior Scale-Teacher Form, and Teacher Interview Forms were used to collect data. Analysis of data was used descriptive statistics, One Way Anova analysis. Results indicated that children's physical and relational aggressive behavior scores significantly differed preschool teachers' intervention strategies of aggressive behavior. According to the results, moderate level meaningful relationships between teachers' preschool teachers' intervention strategies of physical, relational aggressive behavior and students' physical and relational aggressive behavior. Teachers stated that they tried different ways to intervention strategies these problems. However, it was determined that pre-school teachers used the strategy of prohibition and punishment in physical aggression more than relational aggression.