The preschool education reform in the United States in the 1960s aims at narrowing the educational gap. In the 1960s, there was a great educational gap between social classes in the United States, and children of the poor and ethnic minorities usually did not have the opportunity to receive good preschool education, which led to backwardness after entering school. In addition, preschool education is very important for children's development and growth, which can help develop social skills, learn basic knowledge and cultivate curiosity. In order to narrow the educational gap between social strata, improve the opportunities and quality of preschool education for poor and minority children, and promote social equity and development, educational reform has been carried out.