The present disclosure provides an LED display waterproof structure including a display bottom case, a first sealing ring and a waterproof cover. A side surface of the display bottom case is provided with a first U-shaped ring groove, a side surface of the first sealing ring towards the waterproof cover is provided with a second U-shaped ring groove, a first surface of the waterproof cover is provided with a ring protrusion matching the second U-shaped ring groove, the waterproof cover is provided on the first U-shaped ring groove through the first sealing ring, the ring protrusion is connected to the second U-shaped ring groove through interference fit, and the second U-shaped ring groove is connected to the first U-shaped ring groove through interference fit.