An array substrate and display device are disclosed. The array substrate includes signal lines; IC connection lines; the IC connection lines include at least two IC connection line groups, the at least two IC connection line groups include a first IC connection line group and a second IC connection line group, the base substrate further includes a dummy area, the dummy area is provided with a floating pattern, the dummy area includes a separation area and two sub-dummy areas, an extending line of the signal line corresponding to a first IC connection line and an extending line of the signal line corresponding to a second IC connection line respectively fall into the separation area, at least in the separation area, the floating pattern only includes first floating lines substantially extending along the second direction.