1. A display substrate, which includes an anode layer, a cathode layer and a luminous layer that is provided between the anode layer and the cathode layer, the anode layer including a plurality of anodes and the luminous layer including a plurality of luminous regions, wherein the display substrate further includes at least one assisting electrode, the assisting electrode being insulated and spaced from the anodes, and the assisting electrode contacting the cathode layer in parallel, such that a total resistance of the assisting electrode and the cathode layer connected in parallel is smaller than a resistance of the cathode layer alone.