The invention belongs to the technical field of the dynamic simulation verification of power systems and particularly relates to an identification method for the error tracing of the dynamic simulation verification of a power system by utilizing the data of a WAMS (Wide Area Measurement System). There are many factors influencing numerical simulation precision in a power system, and therefore, thenumerical simulation error tracing method based on the data of the WAMS can position a simulation error source in a smaller area or element. The method comprises the steps of: selecting characteristic quantities; establishing an index system; and performing block decoupling. According to the method of the invention, the dynamic space-time characteristics of the power system are extracted from measured data, so that mapping relations between element model parameters and the dynamic space-time characteristics of the power system are obtained; error tracing is positioned according to the strength of the mapping relations; a correctable area is identified; elements are subjected to block decoupling, and simulation verification is performed; and therefore, the simulation error tracing is greatly reduced. With the method of the invention adopted, an effective and rapid method is provided for the dynamic simulation verification of a large-scale power system; simulation error tracing is rapidly identified; and the correction efficiency and accuracy of the large-scale system are improved.