Online sports teaching has long faced the problems of monotonous teaching demonstration and insufficient interactivity, and the development of virtual reality technology provides a useful reference for revolutionizing the traditional sports teaching mode. This paper combines the linear interpolation and quadratic spherical interpolation methods to optimize the virtual human animation technology, and then selects the public frame and calculates the splicing algorithm and action fusion formula to deal with the related action and irrelevant action segments of the action scheduling problems, optimizing the smoothness of the articulation between the frames of the sports teaching animation, and improving the accuracy of the presentation of the virtual sports action. A sports teaching aid system is established, and its application effect is analyzed based on two optimization parts. The experiment shows that the average performance of boys’ high horizontal kick is improved by 10.1, and the average performance of double flying kick is improved by 26.57. The average performance of girls’ high cross kicks increased by 6.68, the average performance of double flying kicks increased by 18.68, and the average overall total score on the virtual reality technology acceptance scale was 3.826 points. Virtual reality technology has been proven to enhance the effectiveness of physical education teaching and is welcomed by students.