The utility model discloses a waterproof dustproof big panel light structure, including light source base plate, diffuser plate, light guide plate, panel beating backplate and aluminium type frame, the subsides of light source base plate are located aluminium type frame's edge, the panel beating backplate seals aluminium type frame's dorsal part, light guide plate and diffuser plate paste in proper order adorn in aluminium type frame's table side, still including openly waterproof two -sided gum acrylic acid bubble cotton and the waterproof two -sided gum acrylic acid in back bubble are cotton, openly waterproof two -sided gum acrylic acid bubble cotton set up in the diffuser plate with aluminium type frame's seam crossing, the back waterproof two -sided gum acrylic acid bubble cotton set up in the panel beating backplate with aluminium type frame's seam crossing. The utility model provides a waterproof dustproof big panel light structure, greatly improved big panel light structure waterproof dirt resistance can, promoted product quality, improved user experience.