Abstract: Provided are a display panel and a preparation method thereof and a display device. The display panel includes an array substrate, where the array substrate includes a first base, a first signal wire layer located on a side of the first base and an anti-reflection layer located between the first signal wire layer and the first base. The display panel further includes a display region and a non-display region; the first signal wire layer includes a first signal wire located in the display region, and the anti-reflection layer includes a first anti-reflection structure located in the display region and a second anti-reflection structure located in the non-display region. An orthographic projection of the first anti-reflection structure on a plane where the first base is located covers at least part of an orthographic projection of the first signal wire on the plane where the first base is located.