The present invention provides a power supply circuit for supplying power for a display device, the display device comprising a standby module and a plurality of functional modules, the power supply circuit comprising a power supply module; a plurality of transformer modules, receiving a power voltage provided by the power supply module, and converting the power voltage into working voltages provided to the plurality of functional modules; and a switch module, connected between the power supply module and the plurality of transformer modules, for controlling the power supply module to provide the power voltage to the plurality of transformer modules, wherein the power supply module supplies power to the standby module directly, and supplies power to the plurality of functional modules through the plurality of transformer modules. The standby power consumption of the power supply circuit is reduced and the structure of the circuit is simplified, thereby solving the problem of large standby power consumption and complex structure of the power supply circuit in the prior art, meanwhile reducing the production cost. The present invention further provides a display device comprising such a power supply circuit.