Diffusion plate support and direct type backlight module

The invention discloses a direct type backlight module which comprises a back plate, a lamp panel, a diffusion plate support and a diffusion plate. The diffusion plate is fixedly arranged on the front sides of the lamp panels, the lamp panels are installed in the middle of the inner side of the back plate, and the distance K2 between the LED lamp on the outermost side of each lamp panel and the side face of the lamp panel is smaller than 1/2 of the distance between every two adjacent LED lamps, so that the strip-shaped diffusion plate support is arranged outside each lamp panel and tightly presses the lamp panel. A plurality of lamp panels are spliced and separated in a grid shape; a plurality of LED lamps are arranged on the lamp panel, lamp panel reflection paper is further attached to the lamp panel to avoid the LED lamps and the diffusion plate support, and the length H1 of the portion, extending out of the lamp panel, of the diffusion plate support is smaller than the light mixing distance H between the