A simple vibration power generation device was designed and fabricated ,and the variation law of theoutput electromotive force of the device with the amplitude and frequency of the external vibration source wastested.In the measurement range , the effective value of the output electromotive force exceeds 0.90 V, andreaches 1.72 V when the frequency f= 5 Hz and the amplitude A= 0.42 cm.The device is simple in structureand easy to operate ,and can be used for simple power generation and teaching of electromagnetic and vibrationknowledge in certain scenarios.