Can we have more than one struts-config.xml file for a single Struts application?

Yes, we can have more than one struts-config.xml for a single 

Struts application. 

They can be configured as follows: 

<servlet>
<servlet-name>action</servlet-name>       
  <servlet-class>
 org.apache.struts.action.ActionServlet
  </servlet-class>
<init-param>
  <param-name>config</param-name>
  <param-value>
     /WEB-INF/struts-config.xml,              
     /WEB-INF/struts-admin.xml,
     /WEB-INF/struts-config-forms.xml          
  </param-value>
</init-param>
.....<servlet>