In view of pedagogics, this article gives a derivation of Maxwell speed distribution law from Boltzmann distribution law with a method that may help the students to grasp the concept of statistics without much mathematical calculations.

• 从教学角度来探讨既能使学生掌握统计概念又不至于使用太多的数学推导 ；由玻耳兹曼分布率导出麦克斯韦速率分布律 .