Disclosed is a method for manufacturing array substrate, including steps of: providing a substrate, forming a plurality of active switches on the substrate; forming a color filter layer on the substrate; forming a spacer unit layer on the color filter layer; and forming an electrode layer on the color filter layer and the spacer unit layer, including forming a first electrode layer in a display region of the substrate, and forming a second electrode layer in a non-display region of the substrate; where the first electrode layer is a pixel electrode layer, the spacer unit layer includes a spacer unit, and the first electrode layer includes a first electrode region overlying the spacer unit, where a vertical projection of the spacer unit along a thickness direction of the substrate has an overlap portion with a vertical projection of the first electrode layer along the thickness direction of the substrate.