The invention discloses a detection method for a sulfur hexafluoride sealing-type combined electric appliance of a three-axis vibration technology. A model construction module is used for constructingan equipment fault model; a parameter acquisition module is used for acquiring the physical vibration frequency of a target sulfur hexafluoride sealing-type combined electric appliance, and the practical change amplitude of the target sulfur hexafluoride sealing-type combined electric appliance in a three-dimensional space coordinate system; a position calibration module is used for obtaining thegeographic position information of the target sulfur hexafluoride sealing-type combined electric appliance; an information acquisition module is used for inquiring a three-dimensional space change range corresponding to the sulfur hexafluoride sealing-type combined electric appliance of the attribute; an intelligent monitoring module is used for making a fault early warning strategy according tothe fault type and the geographic position information of the target sulfur hexafluoride sealing-type combined electric appliance. According to the detection method provided by the invention, the three-axis vibration technology is used for analyzing and judging the vibration frequency and the fault type of the sulfur hexafluoride sealing-type combined electric appliance under a trial state, and the intelligent monitoring and early warning of the working states of electrical equipment, including the sulfur hexafluoride sealing-type combined electric appliance and the like, can be realized.