集合是同学们步入高中所接触的第一个重要概念,它与高中数学中许多内容有着广泛的联系.同时集合作为一种工具、一种语言、一种思想早已渗透到其他学科之中了.在集合的学习中,有不少同学因为忽略了空集的定义、性质以及实质从而导致答题的失误.本文通过各个实例来说明,空集的存在,从而希望帮助同学们对空集的进一步了解. The collection is the first important concept that students come into contact with in high school and has extensive connection with many contents of high school mathematics.At the same time, the collection as a kind of tool, a language and a kind of thought have infiltrated into other disciplines In the study of the collection, many students ignore the definition, nature and essence of the empty set, which leads to the error of the answer.This paper illustrates the existence of the empty set by means of various examples, so as to hopefully help the students to further their empty set To understanding.