A packaging method of a display panel, a display panel and a display device are provided. The packaging method includes: providing a first substrate; providing an adhesive with a magnetic material distributed therein; applying the adhesive to a surface of the first substrate to form a first adhesive layer having a first pattern; providing a magnetic field to drive the magnetic material to mobilize the adhesive on the surface of the first substrate, so as to transform the first adhesive layer having the first pattern into a second adhesive layer having a second pattern, wherein, an orthogonal projection of the first adhesive layer having the first pattern on the first substrate is different from an orthogonal projection of the second adhesive layer having the second pattern on the first substrate; and bonding a second substrate onto the adhesive layer having the second pattern.