In order to improve basketball player’s field-goal percentage, combining with mathematical, mechanical relative aspects principles, by establishing basketball motion trajectory mathematical model when player shoots, utilize variation method, projection method and so on; from minimum angle with angular deviation, optimal incident angle, and minimum angle with speed variation these three aspects, respectively research player basketball shooting angle size influences on field-goal percentage, and get respectively field-goal percentage highest interval is ( 55 40 ) 2 arctan 2 1 2 p -