This disclosure relate to a CPR assistance device, an intelligent terminal, and a CPR assistance system. The CPR assistance device is used to assist a rescuer in performing CPR, comprises a wearing bulk, and further comprises a compression information acquiring module (11) and a processing module (12)； the compression information acquiring module (11) is provided on the wearing bulk, and configured to acquire a moving amplitude and/or an actual rate of moving of the wearing bulk when the rescuer performs a chest compression； the processing module (12) is connected with the compression information acquiring module (11), and can generate an amplitude and/or a rate control signal.
