Teaching Design of Blended Online and Offline Learning Based on PBL

In the context of the new engineering disciplines, higher education proposes to be guided by industrial demand, driven by information technology to promote industrialization, and cultivate composite and innovative talents with strong engineering practical abilities. This poses new challenges to the cultivation of traditional engineering talents. With the rapid development of Internet technology, big data, artificial intelligence and other technologies, this paper takes the course Interchangeability and Technology Measurement as an example, implements online and offline hybrid teaching based on PBL, and cultivates students' practical ability and innovative ability by improving online teaching resources, setting offline teaching, reshaping teaching content, and innovating teaching methods. And through the project case of "Design and Use of Smooth Limit Gauge", demonstrate the process of teaching design and implementation. The practical results show that the blended learning method based on PBL not only enables students to master basic theoretical knowledge, but also improves their self-learning ability, problem-solving ability, and innovation ability.