The scientific research feeding teaching is an important means to improve the quality of cultivating talents in universities. The content, scale, time and management problems were considered fully in this experiment. A knowledge point from the series of research results was selected, which was relatively independent and had the characteristic of exploration. The cadmium content of the four kinds of extractors (DTPA, 0.1 mol/L HCl, 0.01 mol/L CaCl₂ and DI-water) was determined for the test soil treated with three passivation materials (HAP, WB and TMP), and the best passivation material TMP and the extractor DTPA of the tested soil type were determined. The experiment design integrated the individual operation and group cooperation as well as the basic operation and modern equipment. This experiment not only conveyed the cutting-edge progress of the discipline field, but also taught students to use the scientific research tools, which conforms to the requirements of innovative talent model training.