Heartbeat period acquiring method and device based on BCG signal

The invention discloses a heartbeat period acquiring method and a heartbeat period acquiring device based on a BCG signal. The heartbeat period acquiring method comprises the following steps: acquiring the BCG signal transmitted from a ballistocardiography BCG detection device; dividing the BCG signal into a plurality of sub-signals in a preset time sequence, and acquiring variable coefficients of the plurality of sub-signals so as to obtain a variable coefficient set; acquiring a heartbeat interval sequence according to a corresponding sub-signal of a smallest variable coefficient in the variable coefficient set, and processing the heartbeat interval sequence according to a Pauta method, thereby obtaining a heartbeat period. By adoption of the heartbeat period acquiring method and the heartbeat period acquiring device, relatively correct heartbeat period information can be acquired.