Power supply with power-off protection function

The invention provides a power supply with a power-off protection function. The power supply is applied to a robot controller and comprises a power supply conversion circuit, a controller power supplymodule, a network voltage detection module and an energy storage module, wherein the controller power module is connected to the output end of the power conversion circuit and supplies power to the robot controller; the network voltage detection module is connected to the power supply conversion circuit to detect the input voltage of the power supply conversion circuit, and when the input voltageof the power supply conversion circuit is less than a set threshold value, the power supply with the power-off protection function outputs a power-off trigger signal to trigger the robot controller to perform power-off storage; the energy storage module is connected to the controller power supply module, and the energy storage module stores energy when the power supply conversion circuit works normally; when the input vol