Abstract: Subgrade and pavement engineering is a professional core course of civil engineering, which has the characteristics of close combination of theoretical knowledge and engineering practice. Based on the OBE education concept, this paper selects the quality evaluation content of compaction measurement by digging hole and sand filling method in the test link of subgrade and pavement engineering, takes the on-site quality evaluation requirements as the guidance, the four step teaching mode of NAIT is used to explore the teaching reform of experimental content. By integrating the experimental content, improving the design and strengthening the content and standard of process assessment, the engineering ability of students is improved, and a good foundation is laid for students to solve complex engineering problems in engineering.

Key words: OBE, Degree of compaction, Teaching mode