Abstract: The study conducted the intervention training of 12-week core strength and jumping ability of 18 male players and 16 female players in Shanghai Junior Basketball Team, and compared the pre-test and post-test data as well.The results find that the physical ability of male players showed a significant difference while an obviously significant difference for female players.After the intervention training, there existed an obviously significant lowering and significant lowering of the gravity center for male and female players, respectively, with a higher success of the defense against the breakthrough of the opponents.The study suggests that the training of core strength and jumping can improve the players' dynamic stability, agility and explosive levels, thus to keep the positioning of their low center of gravity, which helps to complete the breakthrough or defense against the breakthrough of the opponents.