The present application discloses a display module, a manufacturing method thereof, and a display device thereof. The display module includes a display panel, a cover plate and a first bonding layer and a second bonding layer therebetween. The first bonding layer and the second bonding layer are at least disposed in corner sub-regions of the display module. The first bonding layer contacts the cover plate. A surface of a side of the second bonding layer near cover plate contacts a surface of a side of the first bonding layer away from cover plate. A curing rate of the first bonding layer is greater than or equal to a curing rate of the second bonding layer.