Abstract: As a supplementary way, micro lesson has been applied widely in teaching activities. DNA chemical synthesis of large scale and high throughput is a key technique in the study of synthetic biology. Here we designed a micro lesson to introduce this knowledge. The teaching background, learning objective, teaching content were introduced. The key points and difficulties were analyzed. The learning activities were outlined, and finally, the knowledge points were summarized. We also introduced the teaching characteristics, teaching effects and evaluation of this micro lesson. And finally we shared some experience of making this micro lesson. The results showed that this teaching practice stimulated the learning interests of students and improved the teaching efficiency.

Key words: micro lesson, DNA synthesis, teaching design