Presentation-Assimilation-Discussion (PAD)and Project-Based Learning (PBL)are rooted in similar theoretical foundations and can promote students'deep learning ability.However,both of them have some limitations in teaching practice.Multiple teachers from applied undergrad-uate universities conducted two rounds of rigorous action research in frontline teaching,aiming at improving college students'deep learning experiences,and innovatively put forward the overall Pp-AD-P three-dimensional teaching implementation system of"1 body,2 wings,3 steps and 4D feed-back"after integrating and reconstructing teaching elements And the scientific and practical nature of the teaching innovation system has been successively reflected and confirmed by multi-source evi-dences.