Circuit for improving reliability of standby power capacitor

The utility model relates to the technical field of reliability of standby power capacitors, in particular to a circuit for improving reliability of a standby power capacitor, which comprises a first standby power capacitor module, a second standby power capacitor module, a buck-boost power supply module and an onboard module. The first standby power capacitor module and the second standby power capacitor module are connected with the buck-boost power supply module, and the buck-boost power supply module is connected with the onboard module; and the buck-boost power supply module is used for receiving voltage from the host or the first standby power capacitor module or the second standby power capacitor module and supplying power to the solid state disk. According to the utility model, by arranging the two standby power capacitors, when one standby power capacitor fails, the other standby power capacitor can provide a standby power function, so that all cache data can be brushed to a nonvolatile medium, the p