Background and Aim: Physical activity is an important means to promote the comprehensive and healthy development of children's bodies and minds. The national health strategy and population policy adjustment, the development of kindergartens, and the deterioration of children's physical health have all worked together to bring unprecedented opportunities for the development of children's sports in China. The purpose of this paper is to study the background information of the contents of the curriculum of preschool physical education ability of year 4 students and develop the curriculum to improve the preschool physical education ability of year 4 students. Materials and Methods: The researcher has studied the literature on the development of physical education teachers' physical education ability curriculum to cultivate year 4 students' physical education ability from the aspects of the curriculum development process, components, implementation, and evaluation, and has studied the quality of students' teachers from textbooks, academic documents, and related research. The researcher also used a simple random sampling method to have 4 teachers as a sample. The population is 8 expert teachers in physical education. The research instruments of this study are an interview questionnaire on preschool's physical education ability and lesson plans. Results: Research findings: 1) The 6 components of the course include principles, objectives, content, instructional strategies using situational teaching methods, materials, and evaluation. 2) Preschool physical education ability which includes: 2.1) General ability, 2.2) Special ability, and 2.3) Application ability. After that, the researcher designed and completed the training course components of preschool physical education, and then evaluated the quality by five experts. The IOC value was between 3.80-4.00, and the interrater reliability value was between 0.77-0.79> 0.5. The course components were modified according to the experts' suggestions. Conclusion: The components of the course which include 6 components could improve the preschool physical education ability of year 4 students effectively.