Real-time computation and rapid determination of the distribution range of destructive earthquake fault ruptures are critical to the early warning of major earthquakes and for the timely dissemination of early warning information to potentially affected regions. Utilizing strong earthquake observation data from five significant destructive earthquakes in China,this study employs the Fisher linear discriminant method to establish a discriminant function capable of effectively classifying station records. The method was applied to simulate the fault rupture area of the 2008 Wenchuan earthquake,achieving continuous updates on the rupture area within 5～74s post-earthquake. The inversion results were found to be largely consistent with field geological survey outcomes. Through testing and analysis of actual earthquake cases,this study demonstrates that the inversion results from the applied method can more precisely delineate the fault rupture distribution area. Such precision has the potential to enhance the accuracy of earthquake early warning systems and subsequent rapid intensity reports.