There are many problems in innovative education for undergraduates such as the limitation of experimental conditions and lack of high-level teacher resources in the experimental center. To solve the problems, we put forward a teaching reform, which focusing on theoretical teaching, experiment and practice teaching, and the second class teaching. A new “three levels and two combinations” mode of urban construction and environmental engineering experiments and practice instructions was constructed, which can help students to stimulate their great interest in exploring and creative enthusiasm, and to cultivate their innovative thinking, consciousness and creative ability.