In view of the lack of close connection between theoretical and experimental courses in the current botany teaching,limited time for field practice,one-sided plant classification and identification,and difficult to apply,this paper discusses how to make efficient use of students'fragment time to make short-term practice long-term and centralized practice decentralized,so as to improve the teaching effect of outdoor practice in traditional botany teaching and strengthen botany practice teaching,so as to gradually cultivate students'ability to combine theory with practice.Practice shows that this method can not only overcome the limitations of external factors on practice teaching,but also enhance the interest of theoretical knowledge,stimulate students'enthusiasm for learning,and improve their ability to analyze and solve problems.At the same time,cultivate students'ability to manage fragmented time.