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The problem of UUV path-planning under the environment of movement disorders has been addressed. Firstly, potential field method is proposed to build rejection potential field for fixed obstacles and movement disorders, and attractive potential for objective point. Then, a novel particle swarm optimization (NPSO) is proposed and applied to find the optimal potential field point as the next path point, which point of fixed step length distance from the current point, so as to realize UUV path-planning under movement disorders threat. Finally, simulation is presented, demonstrating that UUV can dodge obstacles and threat, and search for the better sea-lane.