A voltage detection circuit and a voltage detection method are provided. The voltage detection circuit includes a voltage conversion module, a logic processing module, and a high-side driver module. The voltage conversion module obtains a voltage signal of a battery cell. The logic processing module is configured to output a target signal based on a comparison result between a preset threshold voltage and the voltage signal. The high-side driver module is connected to the logic processing module and configured to determine whether to cut off an external power supply to the battery cell based on the target signal.