The present invention discloses an array substrate and a manufacturing method thereof, a polarizer attaching film and a manufacturing method thereof. The manufacturing method of an array substrate includes: removing a part of a release film corresponding to a first attaching area of a polarizer, and attaching the first attaching area of the polarizer onto a base substrate such that the first attaching area is in a non-bonding area; and removing a part of the release film corresponding to a second attaching area of the polarizer, and attaching the second attaching area of the polarizer onto the base substrate such that the second attaching area at least partially overlaps with a bonding area.