Abstract: SQL injection technictue is mainly through the submission of abnormal SQL query, bypassing the database access restrictions, check out the website user information, including the web site administrator, user data. The permission of the webmaster of the site can be obtained by using SQL injection, so it cause a very serious impact The novel SQL injection technology and traditional SQL injection technology, although both the principle is the same, but the former joined the attack techniques of many of the latest applications, injection means arc different This paper analyzes the eauses of SQL injection,and the combined SQL injection firewall source code,a detailed analysis of three novel SQL injection technology.

Key words: Novel SQL injection,Injection of SQL firewall,SQL injection causes