Display substrate, preparation method thereof, and display device

A preparation method for a display substrate, wherein the display substrate comprises a display region and a bonding region on a side of the display region, the bonding region at least comprising a lead area;

• the preparation method comprises:
• forming a plurality of data lines and a plurality of data fanout lines in the display region, and forming a plurality of lead wires in the lead area, wherein orthographic projections of the plurality of data lines and the plurality of data fanout lines on a plane of the display substrate are at least partially overlapped;
• and at least one lead wire is connected to a data line through a data fanout line;
• wherein in the lead area, an orthographic projection of any one of the lead wires on the plane of the display substrate and orthographic projections of other lead wires on the plane of the display substrate have no overlap region,
• wherein at least one data fanout line comprises a first line segment and a second line segment;
• a first end of the first line segment is connected to the lead wire, and a second end of the first line segment extends in a direction away from the lead area, to be connected to the second line segment;
• the second line segment comprises a plurality of sub-segments, the plurality of sub-segments are interwoven to form a plurality of grid patterns, the plurality of grid patterns are repeated and consecutively arranged in the first direction and/or the second direction, and at least one sub-segment is connected to the data line through a via;
• the second direction is intersected with the first direction, and the first direction is parallel to the data line.