An array substrate having a data line self-repairing function and a liquid crystal display device is disclosed. The array substrate comprises a plurality of pixel units, the pixel unit at least comprise a gate layer, a gate insulating layer, a data layer and a pixel electrode layer laminated therein. Every of the pixel unit have a translucent area and opening areas. The gate layer relative to the opening area is retained, and the gate insulating layer does not cover the gate layer, and the data layer relative to the opening area contacts with the gate layer so that a broken data line in the data layer has conductive connection through the gate layer. Through the above solution, the data line has automatic repair function for disconnection and the unqualified rate of the data line during the manufacture processes is reduced.