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The existing on-line fault monitoring methods of fast arc extinguishing switches lack of sufficient data accumulation, and there is a defect of poor real-time fault monitoring in the case of a large number of fast arc extinguishing switches. Therefore, the research on on-line fault monitoring method of fast arc extinguishing switches based on multiple state perception monitoring technology is proposed. The multi-element vibration signal of the fast arc extinguishing switch is obtained by arranging the vibration sensor reasonably with the multi-element state sensing monitoring technology, and the multi-element vibration signal of the switch is denoised by the wavelet transform method. On this basis, the characteristic factors of the multi-element vibration signal of the arc extinguishing switch are extracted. The multi-element characteristic factor weight is obtained, the fused characteristic vector of arc extinguishing switch is obtained, the fault diagnosis model is constructed, and the online fault monitoring of arc extinguishing switch is realized through the fault diagnosis of arc extinguishing switch. The test results show that: compared with the existing representative methods, the proposed method has shorter fault monitoring time and better real-time performance in the case of large number of fast arc extinguishing switches, which is suitable for vigorously promotion and use.