The present invention provides a display module and a manufacturing method thereof. The display module comprises a first plate body, a second plate body, a display panel, and a colliod, wherein the second plate body is arranged on the first body plate and provided with a metal side wall, the metal side wall and an inner face of a side wall of the first plate body form a first gap together; the display panel is arranged on the second plate body and provided with an end face, the end face faces to the side wall, the end face and the inner face of the side wall form a second gas which is communicated with the first gap together; and the colliod is filled in the second gap and bonded with the side wall and the end face. The present invention provides the manufacturing method of the display module, comprising the steps of: arranging the second plate body on the first plate body and forming the first gap; providing the colliod on the inner face of the side wall of the first plate body and above the first gap; arranging the display panel in the first plate body and making the display panel across the colliod; and arranging the display panel on the second plate body and forming the secondgap, wherein the colliod is filled in the second gap. The display module provided by the invention has a narrower module frame.