With the rapid development of science and technology, the functions of smart phones are becoming more and more perfect, while the special situation of the epidemic period combines the functions of smart phones with the teaching process to better play the value of smart phones themselves. Based on the rapid development of science and technology and the background of the post-epidemic era, this paper takes the SWOT theory as the framework. This paper analyzes the advantages, existing disadvantages, opportunities and threats of smart phones in the context of the post-epidemic era. The conclusion shows that smart phones have advantages in breaking through teaching and learning limitations, providing personalized learning methods, improving learning materials, maintaining teaching order and forming values of a few students; opportunities in changing teaching form, meeting students’ personal development needs, relevant national policy support; and threats in replacing other electronic products and national and local policy restrictions.