Abstract: As a classic experimental method in the course system of chemical engineering principle, the liquid-liquid extraction experiment occupies an important position in the experimental teaching of chemical engineering. At the same time, this experiment is also a basic chemical experiment open to non-chemical undergraduates. Such a mature chemical experimental method still needs improvement, especially the safety and environmental problems caused by the use and treatment of kerosene. Exploring the use of white oil instead of kerosene in the extraction experiments, and a green improvement design was proposed for this classic chemical experiment. Combining the relevant experimental and practical results of the college’s applied chemistry and chemistry majors, the liquid-liquid extraction experiment is further developed into a safe and environment-friendly basic chemical experiment.