This paper makes analysis to elbow anatomical structural drawings with the examples of elbow joint sports analysis, and establishes proper simple elbow joint sports model through analyzing. Establish elbow joint force analysis model composed from one fixed coordinate and two moving coordinate systems by analyzing anatomical structure image of elbows bones, muscles and joint, and get the formula of three coordinate systems rotation transformation according to relationships between anatomic structure and angle, thereupon set elbow joint sports fitted dynamics equations set on the basis of mechanic analysis as well as give optimized equation solution to definite equations set, finally verify model reliability through actual data. This paper respectively studied physiological anatomic images analysis method and dynamical equations set and optimize method at the same time of exploring elbow joint kinematic features, provide some reference to practices of sports medicine, rehabilitation medicine and clinical medicine.