击球员击球技术本身具有很多不稳定因素的被动进攻技术，而防守技术中的投球技术具有相对稳定性，并带有进攻性．既然击球技术本身具有相对性，其理论必然带有相对性和多样性．这是因为投手投出球的本身变化因素多，对击球技术要求较高．投球技术的多样性必然导致击球技术的多样性． The batter’s batting technique itself has a lot of passive offensive techniques of instability, whereas the pitching techniques of defensive techniques are relatively stable and offensive. Since the batting technology itself has relativity, its theory inevitably has the relativity and diversity. This is because the pitcher throwing the ball itself changes in many factors, hit the ball high technical requirements. The variety of pitching techniques will inevitably lead to the diversification of hitting techniques.