Aiming to solve the mismatch between overlay topology and physical topology, which exists in mobile Ad
hoc network(MANET) peer-to-peer(P2P) networks, node location information and distribution condition are considered synthetically, and instantaneous topology-aware MANET P2P networks is got. A central node gets global topology changing information, and optimal identity(ID) allocation is translated into traveling salesman problem(TSP). Furthermore, optimal node ID order is obtained by using simulate annealing theory, and dynamic topology-aware MANET P2P networks is realized. Simulation results show that the path is shortened during resource locating, and the latency to service and drop-packet rate are reduced as well.