Mobile Adhoc Network provides a new challenges and difficulty when nodes are used in large network with maximum number of nodes and the reason of limited bandwidth and dynamic topology establish a good route from nodes and maintaining that routes is a very hard. To achieve the security in Mobile Adhoc Network (MANET) is very difficult because of changing topology, wireless links vulnerability, and more management point. In this proposed system we proposed onion protocol with Advanced Encryption Standard (AES) algorithm and multi-hop route forwarding algorithm. In the proposed we propose an onion routing networks using a new protocol. We describe a new secure and reliable packet sending scheme using the onion routing with Advanced Encryption Standard (AES) algorithm. When node comes to registering in network, it will get the primary key, secondary key, node id. Once source identified shortest path to destination node, it will get primary key of all nodes in the shortest path. This onion protocol with Advanced Encryption Standard technique is used to secure the data from other nodes in the network and provide the reliable packet delivery to destination. In this proposed system we use multi-hop Route forwarding algorithm technique to provide efficient shortest path from source node to destination node. It achieves shortest path identification by test of request and response process. In the proposed system all intermediate nodes not only doing packet forwarding and it is responsible for decrypting the packet using that secondary key. Secure and reliable packet delivery is achieved in this system by onion routing with Advanced Encryption Standard algorithm and multi-hop route forwarding algorithm.