The invention discloses a display driving circuit, a driving method of the display driving circuit, and a display device. A power source detection circuit is additionally arranged in the conventional display driving circuit, and determines whether a voltage reference signal, outputted by a power source management circuit, is abnormal or not according to a standard voltage reference signal outputted by a logic circuit; the power source management circuit is controlled to stop outputting the voltage reference signal when the condition that the voltage reference signal is abnormal is determined, so that the power source management circuit is in a static mode, at the moment, a display panel is in a normally white mode or a normally black mode, the possible condition that a gate drive control signal, mismatched with a voltage required by a shifting register, is inputted in the shifting register of the display panel is eliminated, and the phenomenon that an assembled display product is abnormal, which is caused by the fact that a signal outputted by the display driving circuit is mismatched with the display panel, is avoided.