Abstract: Plant related courses are the core of the landscape architecture discipline, while the teaching of these courses in engineering colleges has been in a relatively weak state. In order to improve the teaching effects and enhance students' ability to use plants, this research analyzes the difficulties faced in engineering colleges and puts forward teaching reform ideas based on multi-scale construction practice. It introduces the theoretical teaching innovation with practice as the core, and specifically expounds the construction practice in four scales: 1) Micro-scale: micro landscape construction practice; through easy-to-operate and innovative micro-landscapes to stimulate students' interest in plants and planting design; 2) Small scale: square foot garden construction practice, through the square foot garden to introduce students to the various processes of planting construction; 3) Medium scale: flower border construction practice, through the selection and planting of flower border plants, to become more familiar with plant materials; 4) Large scale: community garden construction practice, though restore actual work process to meet industry needs. Finally, after the practice of multi-scale construction, the learning effect of students has been significantly improved, and the practical results have also been recognized by experts and users. However, there is room for further improvement in terms of long-term operation and course scheduling.