For parallel simulation of the unsteady flow field with moving boundary, a domain-decomposed computation procedure was designed based on the spring analogy method, and the METIS software was introduced to repartition the original grids. With the research of 1-to-1 interface communication styles and realization, the unstructured dynamic mesh solver was parallelized based on the message passing interface. The test shows that the solver has high parallel efficiency, and the module of mesh deforming has significant effect on the parallel performance.