The invention relates to a multi-fault coordinated static security comprehensive aid decision making method. The method includes the following steps that: the calculation result of static security analysis is read; sensitivity analysis is performed on threshold-crossing devices and failure devices; the adjustment directions of adjustable devices, which are required by the threshold-crossing devices, are determined according to the sensitivity relationship between the threshold-crossing devices and the adjustable devices; if a plurality of devices cross thresholds, whether the adjustment directions of the adjustable devices for the threshold-crossing devices conflict with each other is judged; if the adjustable devices for the threshold-crossing devices do not conflict with each other, the method enters the next step; if the adjustment directions of the adjustable devices for the threshold-crossing devices conflict with each other, an adjustability adequacy indicator is calculated, the adjustment directions of adjustable devices which conflict with each other are determined according to the adjustability adequacy; and multi-fault coordinated static security comprehensive aid decision making is solved. The method provided by the technical schemes of the invention is easy to implement, and a coordination optimization problem which appears when the adjustment requirements of multi-fault static security threshold crossing for the adjustable devices conflict with each other can be solved, and a comprehensive aid decision-making adjustment strategy can be automatically given.