In order to explore the influence of coach leadership behavior,group cohesiveness and career satisfaction on competitive performance,we adopt the Coach Leadership Behavior Scale,Group Environment Questionnaire,Career Satisfaction Questionnaire to survey for 241 players.What's more,the scales have passed the testing of validity and reliability.The results showed that:1)the total predictive effect of democratic leadership behavior on competitive performance is not significant,and arise "shadowing effect";2)the behavior of democratic leaders...