Paying attention to children's potential development and personality development is the core concept of Montessori's educational thought, which conforms to the basic requirements of current quality education and is conducive to improving the quality of preschool education in China. Based on this, this paper discusses Montessori's educational thought and analyzes its enlightenment to preschool education in China. . Enlightenment of Montessori's educational thought on China's early childhood education reform Montessori is a world-famous early childhood educator in the 20th century. In the past hundred years, his educational thoughts and methods have had a positive impact on the world's preschool education and spread widely all over the world. Facing the present situation of preschool education development in China and the difficulties encountered in the process, how to combine Montessori's educational thoughts with preschool education in China, find solutions and promote the reform process of preschool education in China has become an important topic we are facing in the new century. This paper first discusses Montessori's main educational viewpoints and his understanding of these viewpoints, and then analyzes the present situation of preschool education in China and its existing problems. Finally, according to the existing problems and Montessori's educational thought, practical strategies and methods are put forward.