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Ad hoc wireless sensor networks have the potential to become a major component of the Information Technology space. Due to the characteristics of sensor devices links and communications. The existing protocols for the traditional ad hoc networks affect the performance of the system in wireless sensor network. In this paper, multipath disjoint (MPD) routing algorithm is proposed. We compare MPD with two on-demand protocols, DSR and AODV. The simulation results show that MPD improves the packet delivery ratio, saves power and reduces the end-to-end delay. As a result, MPD releases the network congestion quite well. The system does not bring paralysis because of the routing breakdown.