The disclosure discloses a line structure for a display screen including a display substrate, a main power supply line and two branch lines. The display substrate includes a display area and a non-display area. The main power supply line is used to transmit a negative signal power supply (VSS) signal, and a length of the main power supply line is less than a length of a long side of the display area, and two branch lines are electrically connected to an end of the main power supply line and extend toward opposite directions along a signal input side of the display area, respectively.