The invention discloses a visual analysis method of power faults. The visual analysis method has the beneficial effects that when fault records are reported after a relay protection device acts or is started, an intermediate state file for internal logical judgment and a corresponding protection principle logical diagram file are also reported, a background server carries out comprehensive analysis and logical derivation on the fault records, the protection logical intermediate state and the protection principle logical diagram reported by the relay protection device, so that visual playback display of the faults is realized, and the efficiency and the accuracy of the fault analysis can be greatly improved; the relay protection device combines graphic data of a prestored logical diagram and the intermediate state file to generate the protection principle logic diagram, i.e., a protection principle logical diagram corresponding to each fault or start is respectively generated during each fault or starting; and the background server only analyzes the files reported by the relay protection device and is not dependent on other input, so that the problem that the protection logic diagram is not matched with a protective procedure is fundamentally solved.