An array substrate and a maintenance method therefor, and a display apparatus are provided. The array substrate includes: a plurality of data signal lines, wherein each of the data signal lines includes a plurality of data signal line sub-segments corresponding to a plurality of pixel units on a one-to-one basis, and each of the pixel units includes a light-shielding metal strip, wherein an orthographic projection of an input end of the data signal line sub-segment on a base substrate and an orthographic projection of the light-shielding metal strip on the base substrate have a first overlapping region used as a first maintenance site, and an orthographic projection of an output end of the data signal line sub-segment on the base substrate and an orthographic projection of the light-shielding metal strip on the base substrate have a second overlapping region used as a second maintenance site.