In outdoor activities, children's desire for activities is strong but their awareness of self-protection is weak. The scope of outdoor activities is wide. When children scatter around, teachers' sight can not take into account every child. The inadequate guidance of teachers makes children not clear about the rules in outdoor activities, resulting in children's weak awareness of rules. Therefore, teachers must improve the ability of safety guidance and safety education. Before the activity, we should try our best to anticipate the possible unsafe factors. Before the activity, the teacher should explain the rules of the activity and related safety matters to the children to enhance the awareness of self-protection. The teacher should travel around, correct children's dangerous actions in time, listen to children talk, evaluation.