Abstract: RRT is the important path planning algorithm.In view of its difficult to directly apply in UAVS path planning, this paper puts forwards the dynamic adaptive RRT algorithm.Adding turn corner constraints in the process of random point produce in order to make track for UAVS tracking more directly.At the same time, introduce dynamic adjustment factor, according to the environment of intensive degree to adjust the planning step length and avoid all kinds of barriers effectively.The computer experimental results show that the dynamic adaptive RRT algorithm in single path planning and more significantly than the basic path planning algorithm and other improvements RRT RRT algorithm, more applicable for UAVS path planning.