Abstract: The fluttering signal due to synchronous heartbeat from human body is used to measure heart rate where the body fluttering signal is caused by the heart which pumps blood round the body. The rhythm of the signal associates inevitably with heart rate and can be detected at the vertebral axis of the body by sensitive force sensor. The signal is so weak and easy to be jammed that the sensor circuit and signal processing circuit should be designed specially, from which the method to detect the signal is described. The fluttering signal acquired initially should be preprocessed for denoising, then the mode maximum algorithm is used to find out the peak point of every and all cardiac cycles, thus obtaining the heart rate. To evaluate the exactness of the heart rate thus measured, a single channel electrocardiosignal should be acquired synchronously along with acquiring the fluttering signal from human body as reference. Test result showed that such a heart rate measurement based on human body fluttering signal can get effective outcome.