Automobile emergency starting power supply and automobile power supply device

The utility model is applicable to an automobile power supply, and provides an automobile emergency starting power supply electrically connected with a storage battery and a starter of an automobile. The automobile emergency starting power supply comprises a charge-discharge switch, a boost circuit and a super-capacitor module group, wherein an input terminal of the charge-discharge switch is connected with the storage battery and the starter, a first connecting terminal of the charge-discharge switch is connected with a power terminal of the super-capacitor module group through the boost circuit, and a second connecting terminal of the charge-discharge switch is directly connected with the power terminal of the super-capacitor module group. With the automobile emergency starting power supply, residual current of the storage battery is used to charge the super-capacitor module group in a low-temperature environment or when the storage battery is low, large current is supplied to the automobile starter by the super-capacitor module group after the charger is completed, and emergency starting is achieved. According to the mode, electric quantity of the storage battery is not consumed when unnecessary, an original battery is not required to replace, and therefore application cost is saved.