A measuring device of heart rate based on the body vibration signals is designed and realized.The heart pumps out blood and causes the vibration of body and the objects contacted with the body.The pressure sensor transforms the vibration into electrical signals.The electrical signals are put into amplification module and other signal processing circuits.Then the outputs are transmitted to computer through serial interface.The data is per-processed and the heart rate is gained by a kind of improved heart rate detection arithmetic.The experiment results show that compared with a single channel simultaneously recording electrocardiogram（ECG）

the heart rate concluded from this device is basically the same as the simultaneous recording ECG.