An engineering software is developed to meet the needs of civil jet landing gear floating characteristics analysis. Based on ICAO Standard Calculation model, three primary functions on the software were achieved in international civil jet landing gear floating characteristics analysis. The calculation precision of the software has reached the international standard. With high engineering practical value, the software can meet the comprehension requirements of both aircraft development and manual writing. So far, the software has been successfully applied in our country’s regional and single aisle civil jet aircraft development.