The present invention relates to an ultrathin backlight module and a touch all-in-one
machine based on the ultrathin backlight module. The ultrathin backlight module comprises a support
assembly, wherein the support
assembly comprises a frame body and a backboard cooperated with the frame body, and an accommodating space is formed between the frame body and the backboard; a
light guide plate
assembly, wherein the
light guide plate assembly is installed in the accommodating space, and the
light guide plate assembly comprises a reflecting layer, a light guide plate and an
optical film which are successively laminated, and a
light source corresponding to an in-light surface of the light guide plate; and a
liquid crystal assembly, wherein the
liquid crystal assembly is disposed in the accommodating space, and the
liquid crystal assembly comprises a liquid
crystal screen installed between the frame body and the
optical film and a PCB connected with the liquid
crystal screen. By adoption of the specific support assembly, the light guide plate assembly and the liquid
crystal assembly for cooperation, so that the number of used materials and equipment is obviously reduced, the thicknesses can be reduced when cost is reduced, and therefore the thicknesses of the light guide plate assembly and the liquid crystal assembly are reduced to about 6mm. Ultrathin design of the touch all-in-one
machine is finally achieved, and the thickness of the touch all-in-one
machine can be reduced to about 25mm.