The invention relates to a vibration alarm device. The vibration alarm device comprises a casing, a PCB, a vibration sensor, and an alarm assembly, wherein a cavity is formed inside the casing; the PCB (Printed Circuit Board) is arranged in the cavity and fixedly connected to the casing, and an analysis circuit is arranged on the PCB; the vibration sensor is arranged in the cavity, and is connected to the analysis circuit and used for sensing vibration, generating an electrical signal and transmitting the generated electric signal to the analysis circuit for analysis; the alarm assembly, whichis arranged in the cavity, is connected to the analysis circuit and is used for sounding an alarm. The vibration sensor senses the vibration and generates the electrical signal after sensing the vibration; the analysis circuit receives and analyzes the signal, judges the vibration amplitude according to a preset logic and controls an alarm device to sound the alarm if the vibration amplitude is greater than a preset value. Therefore, sensitive vibration alarm can be realized.