Based on small earthquake catalog data from 2000 to 2008 in the Longmenshan fault zone and its neighboring areas, we apply the idea of impact“superposition”of global earthquake activity(M＞7)in systematically analyzing the anomalous activity characteristics of remotely and dynamically triggered small earthquakes in the neighboring areas before a major earthquake. Results show that before the Wenchuan MS8.0 earthquake, the small earthquake activity in the Longmenshan fault zone and adjacent areas was influenced by global earthquake activity(M＞7). About one year before the MS8.0 earthquake, there were significant abnormal characteristics of small earthquake activity triggered by remote earthquakes. The reliability of calculation results was verified by using the random test method and changing the statistical parameters. The method can effectively highlight the anomalous activity characteristics of small earthquakes that are remotely and dynamically triggered on the seismogenic fault before a major earthquake, thus having some reference significance for regional strong earthquake risk assessment.