The invention discloses a power grid accident opening auxiliary analysis method. The power grid accident opening auxiliary analysis method is characterized by comprising the following steps that step 1 accident opening original data are collected from multiple data sources, an accident opening database is built, and the data sources comprise an EMS database, a PMS database and a city fault reporting database; step 2 the accident opening original data in the accident opening database are pre-processed, and accident opening data are obtained; step 3 the accident opening data are displayed in an integrated mode with equipment as the center. By means of the power grid accident opening auxiliary analysis method, a complete power grid accident opening auxiliary analysis system is built, the power grid equipment with trip faults can be rapidly positioned, and the result is accurately judged according to the auxiliary information.