Background: Education of moral intelligence is an important component of child education that can help individual and social development of children. The purpose of present study was to investigate the effect of moral intelligence on social performance and behavioral problems of elementary students. 
Method: This study was a semi-experimental research with pretest-post test. The population consisted of all girl students of 2th grade of elementary schools in Ardakan city in 2014-2015. 36 students were selected by in access sampling and randomly assigned in experimental and control groups (each groups 18 students). Each group has pre-test with child behavior checklist (CBCL) and social competence scale (teacher form). In study group, participants received 11 session of moral intelligence intervention and control group received no intervention. In the final sessions, each group have post-test. Finally, the data analyzed by multiple analysis of covariance (MANCOVA).
Results: The results show that a significant difference between experimental and control group in social performance and behavioral problems and moral intelligence could significantly improve social performance and decrease behavioral problems of children.
Conclusion: Regarding social needs in moral development, results show that intervention based on moral intelligence is an appropriate approach to improve social and behavioral performance in children.