Studies have pointed out that with the growth of children's age, children can better listen to their peers' opinions and cooperate with them. When they express their wishes, they maintain peer communication by adding new angles. Moreover, older children show more positive emotions, leadership, tolerance and prosocial behavior in the game. Cao An's survey on the relationship between social communication ability of urban children aged 3-16 and their family factors shows that children's social communication ability is improved with their age. In this process, there is an acceleration period from small class to middle class, and there is a slow improvement trend from middle class to large class, but the growth rate is not obvious.

(2)4-6 years old is the key period of development

The research points out that 4-year-old children have fixed and parallel playmates, 4-year-old children are more able to directly approve and influence their peers' emotions than 3-year-old children, and 5-year-old children will spend more time interacting with their peers. Studies have shown that 4-year-old children begin to make friends, and 5-year-old children gradually shift from maternal love to peer needs. Childhood, especially the age of 4-6, is a critical period for the formation and development of peer relationship. Children's peer communication activities in games are divided into six levels: mindless, stand by, lonely independent games, parallel activities, companion games and cooperative or organized primitive games. The first four kinds of games are activities without participation or peer interaction, and only companion games and cooperative games can be counted as children playing games on the basis of peer interaction, while 4-year-old children's companion games and cooperative games began to increase gradually, occupying the dominant position of games.

(3) Significant gender difference

Regarding the gender difference of children's peer communication ability, the main point of the researcher is that there are significant differences between male and female children's peer communication ability, and it is agreed that girls' peer communication ability and peer relationship are significantly better than boys'. This may be because children communicate with same-sex peers most of the time, forming different cultural atmospheres for male and female children, and children who have grown up in different cultural atmospheres have formed their own interests and behavioral characteristics. Boys' game groups are larger, and they play in public places more often, less controlled by adults, and boys' games are rougher and have more physical contact. On the contrary, girls' peer communication emphasizes more cooperation and language communication. Therefore, the characteristics of girls' activities are more in line with the requirements of adults, showing the superiority of girls' peer communication.