Taking middle school students in the English Basketball Camp as the research subjects,questionnaires and interviews are used to find the effect of sport English teaching on learners' motivation.Findings reveal that the motivation of the subjects has enhanced obviously; Both the integrative motivation and the instrumental motivation have improved.The causes may lie in the colorful basketball English course,appealing teaching methods,and the same hobbies among learners.Therefore,English teachers can utilize students' interests,use flexible teaching methods and create an energetic learning atmosphere to motivate the learners.