Abstract: Web Application (WA) is one of the common prevalent platforms for the delivery of information and services via. internet now a days. Therefor, the importance of web application has increased. At the same time, security risks have also increased. Depend on the OWASP’s reports (Open Web Application Security Project) there are ten risks have been listed as the top ten security risks for any web application in the world. SQL injection is one of topmost security risks in OWASP which is considered in this research. So, securing and maintaining the web application against SQL injection is very hard task and can be classified as a challenge. In this study, a proposed system works on detecting and preventing SQL injection via. using a method named Multi-Connect Architecture (MCA) has been developed. The number of queries used for training about 252 queries while the number of queries used for testing about 1806 queries. The result of the proposed system are 99.88 and 100% for classification rate and detection rate, respectively.