Basing on the basic concept and theory of K factor, The correct selection of K factor value and its im-portance in different experement situation and The method of amendment are discussed.

本文从K系数的基本概念与基本理论出发，针对各种不同条件实验情况讨论了K系数的正确选择的必要性，介绍了相应的K系数修正方法。