Use the DIS sensor to design interdisciplinary experiments to explore the relationship between the resistance of the electrolyte and the distance between the plates, the facing area, the concentration of the solution and the type of the solution, so as to further explore whether the law of resistance is applicable to the electrolyte. Combining physics knowledge with chemistry, on the one hand, consolidates related knowledge, on the other hand, it better cultivates the scientific literacy and interest of middle school students.