The invention relates to the technical field of vibration sensors, specifically relates to a three-axial vibration sensor structure, and aims to solve the problem that the existing three-axial vibration sensor produces high-frequency resonance easily, is vulnerable to electromagnetic interference and is large. The three-axial vibration sensor structure is characterized in that the structure comprises a fixing device, a signal transmission device and a measuring device; the measuring device is fixedly connected inside the fixing device; the signal transmission device penetrates into the fixing device from outside the fixing device, and is connected with the fixing device; the signal transmission device is further connected with the measuring device; the measuring device is used for measuring the acceleration of an object to be tested; the fixing device is used for supporting and protecting the measuring device and the signal transmission device; and the signal transmission device is used for transmitting an acceleration signal measured by the measuring device to signal acquisition equipment. Through integrated design of four rigid printed circuit boards and three flexible boards, reliable interface connection is realized, the internal space of the sensor is saved, the frequency response is improved obviously, and the signal nose is decreases obviously.