The purpose of this study is investigating the types of socially beneficial behaviors in children's play situations. First, collect relevant literatures as the data for analysis understand the children's game situations and social behaviors, and then analyze the types of children's social behaviors in games. This research is based on the observation methods. The research object is a mixed-age class of a preschool of the public elementary school in Tainan City, with 25 children in total. By the way of observation, analyzing and summarizing the collected data, and investigate the research results that meet the purpose. The followings are the main discoveries the types of social behaviors of children in different game situations are: 1. The type of social behavior in the building block area is polite and cooperative behavior; 2. The type of social behavior of the doll house, pretending area is sharing and empathy; 3. The most common type of social behavior in the art education area is helping others; 4. There are no social behaviors in the puzzle area and language area.