Pixel definition layer based on ink-jet printing and preparation method thereof

The invention discloses a pixel definition layer based on ink-jet printing and a preparation method thereof. The method comprises the following three steps: preparing a substrate for depositing a TFTdrive circuit; depositing a first pixel definition layer located at the bottom; and depositing a second pixel definition layer located at the top, wherein the first pixel definition layer should be made of a material with excellent hydrophilic performance wettability, the second pixel definition layer should be made of the material with poor hydrophilic performance wettability, and the second pixel definition layer is a regular trapezoid structure; moreover, at least one of the first pixel definition layer and the second pixel definition layer is a lighttight material; at least one of the first pixel definition layer and the second pixel definition layer is an insulating material; the first pixel definition layer and the second definition layer both have ink solvent resistance; and the pixel definition layer can b