In the process of certification of Environmental Engineering, the teachers' teaching concept of is changed, and the students' ability of acquiring knowledge independently and applying knowledge enables them to have sufficient space to think actively and learn independently. Under the premise of the changing the teaching mode, the students' interests and enthusiasm of learning are stimulated, and the change of assessment mode increases the students' practical ability and application ability, which helps to make the students do the experiment willingly, mobilize their enthusiasm and improve the teaching quality of experimental courses.