二项分布是在n次独立重复试验中引入的一个概念,它是一种常见的、重要的离散型随机变量的概率分布,引入它实际上是对独立重复试验从概率分布角度的进一步研究．然而我们在利用二项分布原理解决实际问题时只注意到两点,即解释为什么可以看成二项分布模型,其次是考虑到它的计算,却往往忽视对计算结果进行解释．鉴于此,我们选取几个典型案例进行剖析,供参考． Binomial distribution is a concept introduced in n independent trials, which is a common, important probability distribution of discrete random variables. Introducing it is actually a further study of the probability distribution of independent trials. However, when we use the principle of binomial distribution to solve practical problems, we only pay attention to two points, that is why we can consider it as a two-distribution model, and secondly, considering its calculation, we often neglect to explain the calculation results. In view of this, we select a few typical cases for analysis, for reference.