Objective: to investigate the effect of Thera-band training system on adolescent health and fitness. Methods: to practice 50 adolescents with Thera-band training system, through a period of 3 months of scientific training, before and after the training, body shape, body function index, quality index were tested. Results: subjects after training exist significant differences before and after the body shape index sebum% , muscle content, armposterior and dorsal skinfold thickness experimental, the BMI value has little effect; the indexes of physical function in resting heart rate and vital capacity before and after the experiment exist significant differences, blood pressure has no great changes; quality indicators of muscle strength, balance of before and after the experiment exist significant differences