Abstract: The measurement of chromium content in water involves a lot of theoretical knowledge and norms for the use of instruments. There are also a lot of experimental content that teachers need to explain in the classroom. The article designs a new teaching strategy based on the characteristics and training objectives of non-chemistry undergraduates. The solution preparation work is reduced, the difficulty of the experiment operation is appropriately reduced, and the requirements for instrument analysis and data processing are enhanced. With the help of video, wall charts, physical objects, manuals and other media, multiple teaching methods are combined with each other to promote the superimposed effect of the teaching process. The article also analyzes the problems that have a greater impact on the test results and need to be explained carefully in the classroom to help students better understand the experimental content. The improved experimental teaching scheme has improved the experimental efficiency in the classroom and achieved good teaching results.