The invention relates to an array substrate, a method for manufacturing the array substrate and a display device comprising the array substrate, belonging to the technical field of displaying and aiming to solve the problem that the contrast of the existing liquid crystal panel is too low. The array substrate comprises a grid line and a data line for defining a pixel region; the pixel region comprises a thin film transistor region and a pixel electrode pattern region; a grid electrode, a grid insulating layer, an active layer, a source electrode, a drain electrode and a passivation layer are formed in the thin film transistor region; a grid insulating layer, a pixel electrode, a passivation layer and a common electrode are formed in the pixel electrode pattern region; a multidimensional electric field is formed by the common electrode and the pixel electrode; and a colored resin layer is formed between each grid insulating layer and each pixel electrode. According to the technical scheme provided by the invention, because a colored resin layer is formed above the grid insulating layer of a thin film transistor, the structure in the pixel region can be flattened, the irregular arrangement of the liquid crystal in the reflection region can be avoided, the light leakage can be prevented, and the contrast can be improved.