Objective To explore the influencing factors of intelligence development of children attending early develop-promoting class(early class),and to provide the countermeasures of improving the effect of early class and promoting intelligence development of children. Methods A total of 252 families attending the early class during 2013-2015 were investigated by questionnaire about the children and actual raisers.The children attended the early class once per week,and were evaluated the developmental quotient (DQ) at the attending time,6 months,and 12 months later. Results Children's DQ increased by 11.48±4.12(t=23.58,P＜0.01) at 12 months after attending class.Multivariate linear regression analysis showed that children's age at attending,Apgar score at birth,relationship between children and actual raisers,family income,rate of class attending,rate of family training after class and score of early develop-promoting knowledge were the influencing factors of intelligence development of children attending early class (F=18.649,P＜0.01). Conclusion Attending early class as early as possible,strengthening management of class,and paying attention to early develop-promoting propaganda of children can improve the effect of early class and promote intelligence development of children.