The invention relates to the technical field of stirs, in particular to a vibration device for a stirrer. The vibration device comprises a vibration transmission device, a transmission shaft, a stirring shaft, bearings I, a bearing pedestal I, a bearing II and a bearing pedestal II, the transmission shaft penetrates through the bearing pedestal I is supported in the bearing pedestal 1 by at leasttwo of the bearings I, one end of the transmission shaft is connected to the vibration transmission device, and the other end of the transmission shaft is rotationally connected with the bearing pedestal II through the bearing II, the bearing pedestal II is fixedly connected with a shaft head at one end of the stirring shaft, and the rotary center line of the transmission shaft and the axial lineof an inner rollway of the bearing II are arranged in an offset mode. The vibration device for the stirrer has the advantages of being simple in structure, convenient to disassemble, assemble and maintain, low in manufacturing cost, high in material practicability, stable in vibration performance and flexible and diversified in shock excitation scheme implementation.