An array substrate (901), a manufacturing method therefor and a liquid crystal display device. The array substrate (901) comprises: a plurality of scan lines (10); a plurality of data lines (20) arranged to intersect with the plurality of scan lines (10) so as to define a plurality of pixel regions (30); a plurality of auxiliary line segments (40, 50), each scan line (10) and/or each data line (20) corresponding to at least one of the auxiliary line segments (40, 50), and said scan line (10) and/or data line (20) being capacitively coupled to the corresponding auxiliary line segment(s) (40, 50). The present invention can reduce signal delay time on the scan lines (10) and/or the data lines (20), the charging rate, improving the display effect.