Cooperation between preschool educational institutions and the children's families in China is represented in the master's thesis. Preschool educational institutions and families have a cooperative relationship. Family education is particularly important, should uphold the concept of respect, equality and cooperation. Preschool educational institutions have to understand the children's parents and recognize their role in the cooperation, and jointly with parents participate in early childhood education, support and guide parents to improve the level of education, establish a correct education concept. Therefore, in the process of cooperation between the family and the preschool educational institution, the preschool education institution and the family are a whole and inseparable. The research mainly focuses on parents and preschool teachers. Through questionnaires and interviews, the research is conducted on the current situation of cooperation between some families and teachers in preschool educational institutions. In order to further improve the effect of cooperation between the family and the preschool educational institution, the following measures are offered: strengthen the awareness of laws and regulations of cooperation between preschool educational institutions and families, and improve the importance of this cooperation at the legislative level; enrich the contents of cooperation between preschool educational institutions and families, and improve the comprehensiveness of such a relationship; innovate the forms of cooperation between preschool educational institutions and families, and improve the effectiveness of this cooperation; expand the degree of cooperation between preschool educational institutions and families, and improve the participation of preschool educational institutions and families in the process of this cooperation. Key words: preschool education, preschool educational institution, family, cooperation