The invention discloses an electric-power-automation-system real-time alarm data folding display method. The method comprises the following steps of S1, classifying alarm information and inquiring whether the same kind of alarm information exists in a data queue according to classification; if the same kind of alarm information does not exist, steering to S2; otherwise, steering to S3; S2, acquiring subsidiary information of the alarm information, inserting the alarm information and the subsidiary information into the data queue, changing a folding frequency into 1 and simultaneously sending the alarm information to a real-time alarm window; S3, extracting the same kind of alarm information in the data queue, carrying out folding rule comparison on the acquired alarm information and the same kind of alarm information, and carrying out folding display on the alarm information and the same kind of alarm information on the real-time alarm window when a folding rule is satisfied; S4, repeating the stepS1,the stepS2 and the stepS3, and displaying the alarm information in a folding mode by the real-time alarm window according to acquired real-time data. By using the method, frequent alarm information is arranged so that the alarm window is clear, which is good for monitoring.