The invention belongs to the technical field of power system numerical simulation model parameter correction, and particularly relates to a method for establishing a simulation error evaluation indexbased on trajectory characteristics, in particular to a method for establishing a simulation credibility index system based on trajectory characteristics. The method comprises the following steps: injecting measured data into a simulation system by adopting a hybrid dynamic simulation method of impact load injection; calculating the track sensitivity of the simulation track to each parameter, andselecting a to-be-corrected parameter set with relatively high track sensitivity; performing hybrid dynamic simulation by using the corrected parameter group, and calculating simulation error indexesbefore and after correction, the simulation error indexes including a voltage error index and a power error index; comparing the error indexes before and after correction, and if the error value aftercorrection is smaller than the error value before correction, adopting the corrected parameters for simulation. According to the method, judgment errors caused by qualitative analysis are effectivelyavoided, the difference degree between simulation and actual measurement is reduced, and the simulation credibility is improved.