In this study, we made a comparative analysis of analogies used in biology chapters of middle school science textbooks, high school science textbooks and high school biology textbooks. In addition, this study investigated comprehensive tendency of analogies used in biology chapters of secondary school. Total number of analogies was 810 in the biology chapters of secondary school and 490 kinds of analogies were included. The frequency of used analogy per 10 pages became less on high grade in biology chapters of middle school. In biology chapters of high school, it became more with higher grade. There were 51 kinds of commonly used analogies between school years in whole analogies. The frequency of common analogies was presented 266. Most patterns and roles of common analogies were the same as that of whole analogies but it was higher than most patterns and roles of whole analogies. From these results, it is necessary to develop more systematic analogies. It should be replaced improper analogy to proper one and introduced proper analogies in new biology textbooks to help student` understanding of biology concepts.