MANET is a wireless medium and it is infrastructure less service. It did not have any basic infrastructure. In mobile ad hoc network nodes are independent nodes, which are travel along a network without any restriction. Then it focuses the communication within range, and quantity of nodes for geographical packet forwarding procedure. Each node will act as sender and also receiver. Recent issues in mobile network are load imbalance, more communication delay, finding best path is difficult and energy consumption for the specific routing path. Terminal reliability doesn't consider for this swarm improvement process, by utilizing different superfluous ways between the source and the goal, which limits the authority of this issue. This reduces the network lifetime, efficiency and increases the delay. The Proposed Extensible Particle Swarm optimization (EPSO) technique is implemented to obtain the reliable routing path, which has better achievable reliable lifetime, because nodes are ready to forward data packet continuously. The route set choosing algorithm is designed to discover the efficient node sets and fix the load-balancing path. This manages the heavy load during communication period by optimizing efficient path. This improves the network lifetime, efficiency and reduces the end-to-end delay.