The invention discloses a wireless vibration sensor. The sensor comprises a sensor body, a protective shell is arranged on the outer side of the sensor body, a fixing base is arranged at the bottom ofthe sensor body, the protective shell is sleeved with a groove in the top of the fixing base, a rotating sleeve is rotatably connected to the bottom of the fixing base, and threaded rods are rotatably installed on the two sides of the inner surface wall of the bottom of the fixing base through bearings. In the present invention, the rotating sleeve rotates forwards, a gear serving as a driving wheel is driven to rotate, according to the meshing transmission principle of latches, gears serving as driven wheels on the two sides are driven to rotate reversely, the threaded rods are driven to rotate, according to the thread transmission principle, a fixing plate is driven to move upwards, then the protective shell is driven to be away from the fixing base until the fixing plate is separated from the threaded rods, dismounting of the protective shell and reverse operation of the rotating sleeve are completed, finally, mounting of the protective shell can be achieved, the structure is simple, dismounting and mounting are convenient, and the protective shell can be repeatedly recycled and is high in economic practicability.