Abstract: The mode to capability analysis and correctness verification of workflow process is divided in static inspection and dynamic simulation.Especially the paper studies several key problems in process simulation，setting up simulation enviroment，the algorithm for arranging events in a queue based on path coverage rule，analyzing simulation results.It adopts interactive and non-interactive means，employs white-box and black-box methods to test workflow process based on high coverage rate.And at last it gives expression to type，distribution and trend of process defects.