The invention discloses a dynamic boundary flow field numerical simulation-oriented local area grid reconstruction parallel method, which comprises the following steps of finding out and marking a unit needing grid reconstruction for an input deformed distributed grid in parallel; using a parallel region decomposition method to segment the old grid with the holes, and then re-allocating the obtained sub-grids to all available processors; performing grid reconstruction on the distributed holes in parallel; and distributing the new grids to different processors in parallel, so that the scales ofthe grids on the processors are balanced, and the new distributed grids are obtained. According to the method, the problem that the existing large-scale dynamic boundary flow field parallel numericalsimulation utilizes a non-structural dynamic grid solution method, and the parallel local region decomposition is not realized, can be solved, the method can be well integrated into existing dynamicboundary flow field simulation, the complete parallelization of a dynamic boundary flow field simulation system is achieved, and the performance bottlenecks are overcome at the aspects of memory consumption and calculation efficiency.