After more than ten years of exploration, a dual return path of "extracurricular-in-class-extracurricular" and "all-staff-top-notch-all-staff" for application-oriented undergraduates' practice and innovation ability training has been explored. This route could lead from point to area, from the old to the new, and lead the excellent students to drive ordinary students in cultivate innovation ability, and it is to improve students' initiative and participation in innovative practice. The construction of this path starts from top-level design, to scientifically build an innovative talent training system that combines in-class teaching and extracurricular practice. At the same time, a reasonable and effective innovation platform for students that integrates competition and education should be built to ensure that the training of innovative ability extends from in-class to extracurricular. Finally, the selection mechanism should be optimized to cultivate students' practical innovation ability by classification, and the main status of students in innovative practice should be established, to ensure the training effect. This method is implemented in School of Civil Engineering & Architecture in Taizhou University. The effectiveness of the dual return path in cultivating innovation ability is reflected in students' awards in competitions, quality and quantity of innovation results, employment rate, employer satisfaction feedback, and graduate satisfaction surveys.