Children participate in social interpersonal communication from birth and evolve from the living creature into a social person. The key step in this process is the socialization of emotions. Baby gains a sense of security from mother-infant attachment. As they grows older, the children begin to socialize with their peers with the support of mother. They learns to recognize the expressions and emotions of others, and can adjust their emotions to meet the needs of society and realize socialization eventually. Family structure and type, family environment, parental education, and parents′ expectation all play crucial roles in children′s growth and socialization. Factors including poor family environment, improper parenting style, early parent-child separation, and mother′s emotional problems negatively impact children′s socialization, which should raise the caution of the whole society and need to be considered in the intervention early.