Embodiments of the present invention provide an array substrate, a fabrication method thereof and a display device. The array substrate comprises a driver IC and pixel units, wherein each port of the driver IC is connected to a plurality of pixel units through a connecting structure, each connecting structure comprises a connecting line connected between a port of the driver IC and a plurality of pixel units, at least some of the connecting structures also comprise resistance regulating units for changing the total resistance values of the connecting structures, and the resistance regulating units are connected in series with the respective connecting lines; and/or the resistance regulating units are connected in parallel with parts of the respective connecting lines, so that the differences among resistance values of connecting structures can be reduced, and in turn the display effect of a display panel is improved.