The impact of team heterogeneity on team effectiveness has been the concern of many scholars,strong heterogeneity of team will cause a lot of differences and inconsistencies in the work and have a negative im-pact on team effectiveness.Based on I-P-O model,this paper studies the impact of team heterogeneity on team ef-fectiveness through team process,using questionnaire survey methods,while the introduction of leadership as ameans to regulate this impact,this paper believes that the difference of team members have a significant negativeimpact on the team effectiveness through the team process,while the relationship-oriented leadership behaviorwould effectively regulate this kind of negative effects.