The present disclosure provides a liquid crystal display module, a manufacturing method thereof and a display device. The liquid crystal display module includes: a cover plate; a TFT array substrate disposed on one side of the cover plate; and an opposite substrate disposed on one side of the TFT array substrate away from the cover plate, a liquid crystal layer being filled between the TFT array substrate and the opposite substrate, the TFT array substrate includes a first portion opposite to the opposite substrate and a second portion extending beyond the opposite substrate, a drive circuit being disposed on one side of the second portion away from the cover plate; a backlight disposed on one side of the opposite substrate away from the TFT array substrate, and a heat shielding layer disposed between the second portion and the backlight.