The invention discloses an electric power multi-source information fault positioning and pre-judging method. The electric power multi-source information fault positioning and pre-judging method comprises the steps of: 1, generating a complex event model in a format required by complex event processing engine analysis; 2, summarizing expert experiences as a complex event form, and inputting regulation and control problems to generate a complex event rule matching model; 3, determining whether to start an offline self-learning thread; 4, outputting reliable events; 5, establishing a Petri inference rule association model; 6, reading the Petri inference rule association model in a Petri inference thread, and monitoring complex event sets in real time; 7, and triggering a fault recovery and processing thread, directly calling a disposal plan or finding all possible power supply recovery paths, and providing a scheme. The electric power multi-source information fault positioning and pre-judging method ensures the rapid aggregation and accuracy of electric power complex events, mitigates the combinatorial explosion problem of Petri fault inference, processing item omitted reporting caused by identification protection, switch rejection action and maloperation as well as communication problem by means of a CEP engine, simplifies the complexity of the Petri inference process, and positions the faulty equipment quickly by means of the Petri inference rules and diagnostic models.