The present invention discloses an array substrate which includes a peripheral driving circuit region. The peripheral driving circuit includes a first metal layer, a first insulating layer and a second metal layer sequentially formed on a base substrate. There is a signal transmission line provided in the driving circuit region. The signal transmission line is connected in series with a current limiting unit. The current limiting unit includes M first metal lines formed in the first metal layer at intervals and N second metal lines formed in the second metal layer at intervals. The M first metal lines and the N second metal lines are alternately connected in series with each other through vias provided in the first insulating layer, and M and N are integers greater than 1, respectively. The present invention further comprises a display device including an array substrate mentioned above.