Many factors,such as noise,speckles and low modulation in wrapped phase make the unwrapping procedure complicated and path-dependent. The traditional scanning algorithm will propagate errors along the predefined path to the boundary. Based on the scanning algorithm,a new error-correcting method,which is combined with filtering,is proposed. This method can simply eliminate the propagation of errors after phase unwrapping without avoiding error areas. Also,the results of the simulation and experiment prove its effectiveness.