The invention provides an LED surface light emitting tri-proof light and belongs to the technical field of semiconductor lighting. The LED surface light emitting tri-proof light comprises a light body, aluminum substrates arranged in the light body, a bottom plate and a surface cover, wherein the bottom plate and the surface cover are disposed on the upper side and the lower side of the light body separately; end covers are arranged at the two ends of the light body separately; the aluminum substrates are provided with light beads. The LED surface light emitting tri-proof light is characterized in that the light body is composed of two symmetrical L-shaped sub-shells, the bottom plate is arranged between the two sub-shells, the two side edges of the bottom plate are inserted into corresponding mounting grooves in the inner sides of the two sub-shells separately, the surface cover is arranged between the two sub-shells, and the two side edges of the surface cover are inserted into corresponding mounting grooves in the inner sides of the two sub-shells separately; the aluminum substrates are arranged at the top of the bottom plate inside the light body or arranged at the included angles on the two sides of the L-shaped sub-shells. Through scientific design, two light distribution modes can be achieved, and the light emitting angle can also be changed; meanwhile, the tempered glass surface cover is used, damp prevention and dust prevention are achieved, attractive appearance is achieved, safety is effectively improved, and the service life of the light is prolonged.