—The feedback of sonification on CAD analyzing information in addition to picture interface increases user’s accepting information and decreases the load of visual channel. Data overall can be observed and analyzed. According to characteristic of design data, machine simulation and data comparison analysis, data-sound mapping is analyzed. With the example of pressure angle checking about cam mechanism, sonification on design parameter is analyzed with simulated compound method. By data collecting, mapping design, sonification simulation and evaluation, the effectiveness of the sonification is studied. Thus the natural and effective designing environment is provided. Keywords-Sonification, human-computer interaction, data mapping, example/