Aiming at the difficult point of ballistocardiogram( BCG) signal feature extraction in heart disease diagnosis process,a new method of BCG feature extraction is presented taking the synchronous acquisition pulse signal as BCG subsection standard. Firstly,this paper introduces the BCG and pulse signals detection theory,and the original BCG signal is pretreated through the trend of elimination and DB5 wavelet transform. Then the correlation of BCG,ECG and pulse signals is analyzed. Finally,the algorithm of th...