The embodiments of the present disclosure provide a liquid crystal display device. The liquid crystal display device includes: a display panel, including a display region and a non-display region surrounding the display region; a back plate, arranged opposite to the display panel, where the back plate comprises a bottom wall and a side wall extending from the bottom wall to one side of the display panel; a backlight source, arranged between the display panel and the back plate, where the backlight source comprises a light source arranged on the bottom wall of the back plate and a diffusion plate arranged on a light emitting side of the light source; and a middle frame, where the middle frame comprises a first support part, and a second support part connected with one side, deviating from the display panel, of the first support part.