The invention discloses a vibration reduction reinforcing method for a large-sized LCD (liquid crystal display). Step-by-step attenuation of vibration and impact is realized through adoption of multiple layers of full-lamination optical substrates in front of the large-sized LCD and flexible connection of a large-sized liquid crystal display assembly and a structural front casing; a flexible connection structure adopts a combined structure comprising the structural front casing, a conductive buffer layer and the liquid crystal display assembly from top to bottom, or adopts a combined structure comprising a structural front outer casing, a buffer bag, a structural front inner casing, the conductive buffer layer and the liquid crystal display assembly. The display quality and environmental reliability of a large-sized liquid crystal display module in a strong vibration environment can be improved, the fault rate caused by vibration and impact can be reduced, and the requirements for lightness and thinness of the liquid crystal display module are met.