The significance and feasibility about the database based on SQL and the characteristics of SQL database were analyzed. After a lot of data about engineering tests packed up
the database of physico-mechanical parameters of soil was built up. How to use the database and how to maintain it were presented. An example using it to analyze the relationship between compression index and swelling index was presented. With the improvement of the database
it would be significant to investigate correlations between physical and mechanical parameters of soils.