Most traditional mobile ad hoc network routing protocols were designed focusing on the efficiency and performance of the network. Ad hoc network are wireless network with no fixed infrastructure in which nodes depend on each other to keep the networked connected. Ant algorithms are a class of swarm intelligence and try to map the solution capability of ant colonies to mathematical and engineering problems. The Ant-colony-based Routing Algorithm (ARA) is based on ant algorithms. The main properties of the algorithm are high adaptive, efficiency.