lmproving the resolution and range of angle measurement systems is crucial for the development ofangle measurement technology. Compared with traditional angle measurement methods using rotating prisms, theproposed small-angle measurement experimental device based on laser self-mixing interference technology issimple in structure and low in cost, and can improve the resolution of small-angle measurement while expandingthe angle measurement range, and effectively deepen students’understanding of small -angle measurement. By introducing the latest progress of scientifie research into experimental teaching, the designed exploratory experiments can enrich the teaching content of college physics experiments, and play a substantial role incultivating students’scientific research literacy and improving their proactive exploration ability.