The invention provides a power failure incident automatic integration-based analysis device for analyzing the reliability of a power transmission and transformation system. The device comprises an operation information automatic integration module, a power failure incident key element extracting module, a key equipment standing book extracting module, a circuit equipment section and connection point determination module, a circuit and connection point standing book management module, a power failure incident database module, a power failure incident database maintenance module, and a power transmission and transformation system reliability statistical analysis module. According to the technical scheme of the invention, based on the establishment of a main equipment circuit model and a physical connection point model, a comprehensive reliability evaluation criterion is formulated, so that the comprehensive evaluation on the reliability of a power transmission network rack and the power transmission and transformation system can be realized. The problem in the prior art that the reliability evaluation for the power transmission and transformation system cannot be realized by existing operation equipment can be solved. Based on the design and the application of the seamless joint and the associated auxiliary modules of an operation management system, the problems in the prior art that the existing reliability analysis equipment is large in artificial input workload during the occurrence of a power failure incident, the data source accuracy of the power failure equipment cannot be ensured to be consistent with that of a scheduling system, and the application efficiency is low, can be solved.