. In this paper, we provide a Sweet Spot Model for two problems: where the “Sweet Spot” is and how the bat affects the hitting-effect. Our model is very close to live. And we can find the exact position of Sweet Spot and see the relationship between the rebound velocity of the ball after hitting and the factors of hitting point, such as the speed of bat before hitting, the speed of the ball before hitting, Coefficient of Restitution (COR) (a constant determined by the bat material), the mass distribution of bat and so on. After that, we apply our model to corked bats and study the influence of “corking”.