The invention provides a warning association analysis method based on a knowledge base. The method includes the steps that 1, warning information existing in a warning bus is acquired; 2, warning absorption association analysis is conducted on the warning information, and a root warning is obtained; 3, warning deduction association analysis is conducted on the warning information, and a new warning is deducted to serve as a root warning; 4, the result obtained after association analysis is identified in the warning bus in a association identifier setting mode; 5, after the root warning is determined, automatic confirmation is conducted on sub-warnings, and all the relevant sub-warnings are closed synchronously as along as the root warning is closed. According to the warning association analysis method, real-time rule match is conducted on multiple warnings in the warning bus according to the association rules of warning absorption and warning deduction stored in the knowledge base, the absorption relation and the deduction relation are built in sequence to form a tree-shaped structure, so that the root warning is analyzed in real time, the derivative warnings are absorbed, or a new warning is obtained according to the existing warning deduction.