The so called “Giant” is someone who is tall and strong. There are many records about giant figures in strange books of the six dynasties. Giant figures make the plots more unusual and illusory in strange books of the six dynasties. We can find out the origin of giant figures from fairy tales and ancient books of the Han dynasty. In addition, giant figures have changed through history. This paper discusses the origin of giant figures. By doing so, it helps us to understand the development of giant figures before those appeared in strange books of the dynasties.