Emergency power supply circuit and lighting device

An emergency power supply circuit, comprising a charging circuit, an energy storage unit, a main control unit, an auxiliary power supply, a boost circuit, an auxiliary power supply control circuit and a boost control circuit, wherein the boost circuit comprises a boost unit, a feedback unit and a drive control unit;

• the charging circuit is electrically connected to the energy storage unit and the main control unit and is configured to be electrically connected to an external power grid, the auxiliary power supply control circuit is electrically connected to the auxiliary power supply, the main control unit and the energy storage unit, the boost control circuit is electrically connected to the boost unit, the energy storage unit and the main control circuit, the drive control unit is electrically connected to the boost unit and the feedback unit, and the boost unit is configured to be electrically connected to an external load.