Co-parenting is a complex construct that is different from parenting, which focus on the ways that caregivers work together in their roles as parents. Majority of studies suggest that co-parenting have significant influence on child adjustment, directly or indirectly, by the Parent-Child relationship system and marriage relationship system. However, there is no consensus among the researchers about the definition of co-parenting and its evaluation system. Future studies should focus on the basic theory of parenting (such as co- parenting internal structure, evaluation system, etc. ) issues and the co-parenting’s mechanism on child adjustment, as well as combining with the common characteristics of some special types of family as children left home, divorce family, grandparents raising families, families of prisoners.