Power protection method and device

The invention discloses a power supply protection method and device. The method comprises the steps: adjusting a current value of an output current of a power switch to a specified current value through a current limiting function under the condition that the power switch is turned on, wherein the specified current value is smaller than a normal current value which can be output by the power switch; and detecting whether an output end voltage of the power switch is greater than a reference voltage, and determining whether to close the power switch according to a detection result, wherein the voltage at the output end of the power switch is established by charging a capacitor at the output end based on the output current of the power switch with the specified current value. 本申请公开了一种电源保护方法及装置，其中方法包括：在电源开关开启的情况下，通过电流限制功能将电源开关的输出电流的电流值调整至指定电流值；其中，所述指定电流值小于所述电源开关所能够输出的正常电流值；检测电源开关的输出端电压是否大于参考电压，根据检测结果确定是否关闭电源开关；其中，所述电源开关的输出端电压为基于所述指定电流值的电源开关的输出电流对输出端电容充电建立的。