The invention discloses an overvoltage protection circuit, an overvoltage protection method and apparatus. The overvoltage protection circuit comprises a reference voltage selection circuit, an overvoltage protection comparator, a power tube driving module and an input voltage partial voltage module, wherein the reference voltage selection circuit comprises a rise rate detection circuit, a controlcircuit and a voltage regulation circuit; the rise rate detection circuit is used for detecting the rise rate of the input voltage; the control circuit is used for controlling the voltage regulationcircuit to output a voltage matched with the rise rate; the rise rate is higher, the output voltage of the voltage regulation circuit is lower; the input voltage partial voltage module is used for obtaining the partial voltage of the input voltage; and the overvoltage protection comparator is used for outputting an electric level signal for controlling the power tube driving module to disconnect asubsequent circuit when it is detected that the partial voltage of the input voltage is greater than the output voltage of the control circuit. By virtue of the overvoltage protection circuit, damageto the subsequent circuit caused by relatively long overvoltage switch-off response time can be avoided.