The purpose of this article is to demonstrate the impact on children’s development from parents and siblings differed in many aspects through literature review.From the literature review,it shows that parents and siblings contribute differently to children’s emotional,social and cognitive development to some extent.Besides,it seems that having a sibling is more likely to benefit the younger siblings,not the older one. The purpose of this article is to demonstrate the impact on children's development from parents and siblings differed in many aspects through literature review. From the literature review, it shows that parents and siblings contribute differently to children's emotional, social and cognitive development to some extent. Besides, it seems that having sibling is more likely to benefit the younger siblings, not the older one.