Web services have gained popularity today for enabling universal interoperability among applications. In order this, to answer the complex service requirements of the user, composite web services has to be constructed correctly and effectively. For this reason, various approaches have been used for web service composition. Among these approaches we quote the one who allows software agents to access and control Web Services, in this approach the integration between agents and web services platforms is important. For this purpose, the toolkit WS2JADE is developed at the Centre of Intelligent Agent and Multi-Agent Systems, it allows deployment of Web services as JADE (JAVA agent DEvelopment Framework) agents services at run time. Therefore, composition of web services is returned to that of JADE agents services. In this paper we propose a new approach for modeling the composition of JADE agents services and thus web services using the Multi-Agent Reactive Decisional System (MARDS) Model.