The present invention relates to a cardiopulmonary resuscitation auxiliary device comprising a body, an elastic member, a load cell, a processor and a sound effect device. The inner side of the body has an accommodating space； the elastic member is disposed in the accommodating space to provide a feedback force when performing a chest pressing procedure； the dynamometer is disposed in the accommodating space and is held by the elastic member. A pressure value corresponding to a feedback force is generated when a user performs a chest compression program； the processor is electrically connected to the load cell to receive the pressure value； and the sound effect device is electrically connected to the processor. Wherein, when the pressure value meets a first predetermined value, the processor is adapted to control the sound effect device to emit a first sound.本新型創作係關於一種心肺復甦輔助裝置，包含一本體、一彈性構件、一測力器（Load cell）、一處理器及一音效裝置。本體內側具有一容置空間；彈性構件係設置於容置空間內，以於進行一胸部按壓程序時提供一回饋力道；測力器係設置於容置空間內並為彈性構件所頂持，以感測一使用者進行胸部按壓程序時一回饋力道所對應產生之一壓力值；處理器係與測力器電性連接以接收壓力值；音效裝置與處理器電性連接。其中，當該壓力值符合一第一預定數值時，處理器適可控制音效裝置以發出一第一聲響。
