In order to facilitate the progress of the ModelBased Development and Verification (MB) technology, and also provide the certification guidance for the airborne software MB activities, Radio Technical Commission for Aeronautics (RTCA) released DO331 ModelBased Development and Verification standard, as a supplement document to the DO178C Software Considerations in Airborne Systems and Equipment standard in 2011. This Paper provides the abstraction and explanation for the DO331 from the aspects of its structure organization，models usage and category, MB related software lifecycle processes, data and certification objectives, which can help people who use this standard understand its core content quickly and capture the certification concerns of MB, therefore demonstrate the certification compliance well during the program implementation process.