The invention belongs to the power grid fault identification field and relates to a power grid fault event level automatic identification method. The method comprises the following steps: S1, fault source information in an alarm system database is regularly read; S2, switch information is parsed, so that corresponding switch associated equipment can be obtained; S3, a topologic model determines whether devices undergo voltage loss, if no devices undergo voltage loss, no events are generated; if voltage loss occurs, the topologic model traces lower-level voltage-loss devices; S4, all voltage-loss devices are put into statistics, and voltage-loss stations are obtained through analysis; S5, the real-time load of 10kv bus-bars in the voltage-loss devices and user data are put into statistics;and S6, calculation is performed according to accident event judgment rules, and the level of a current accident event is generated and displayed. With the method adopted, fault risk information can be automatically generated; high efficiency can be realized; time can be saved for a dispatcher; the dispatcher can obtain risk reference information immediately; and automatic calculation can be realized, and therefore, manual calculation errors can be avoided, and a misjudgment rate can be reduced.