The report of the 20th National Congress of the Communist Party of China proposed to promote the development of educational digitization and informatization. The 2022 edition of the “Physical Education and Health Curriculum Standards” pointed out that the application of informatization should be strengthened in physical education teaching. These both means that the era of promoting educational informatization and intelligence at the national level has come. As a physical education teacher, we should continuously improve our ability of using information technology in physical education, promote the application of intelligent and information technology into physical education, to meet the needs of students’ physical education development better. The main research methods used in this study are literature review and teaching practice, The aim is to explore the feasibility of using information technology in the pre class preparation and guidance, in class teaching and learning, and after class homework and evaluation of tennis forehand strokes in junior middle schools under the condition of small sports ground in the central urban areas; and to provide theoretical reference for promoting the application and development of information technology into physical education. The research finds that modern information technology tools and equipments are rich and diverse, but it requires physical education teachers and students to master high information literacy. Before and after tennis forehand stroke teaching, mobile terminal devices and interactive platforms are used to send action skills teaching videos, demonstration animations, and thought maps to students. In the class, the usage of multimedia playback devices, photography equipment, interactive large screens, AR interactive tennis projection equipments, and other information and intelligent devices has a good promoting effect in cultivating students’ autonomous learning, developing amateur exercise habits, promoting classroom teaching quality, and improving classroom teaching efficiency. Meanwhile, it is suggested that physical education teachers should continuously improve their information literacy, deeply integrate information, intelligence, digital technology and physical education teaching, and create better and easier learning conditions for students.