The invention discloses a sealing structure of an LED connector. The sealing structure comprises a male end and a female end, which are in matched plugging connection. The female end is provided witha slot, and the male end is provided with a plugging boss. A female end inner sleeve is detachably connected into the slot and located between the plugging boss and the female end, and a sealing sleeve is arranged in the slot, wherein the inner side wall of the sealing sleeve is provided with a first inclined plane and a second inclined plane abutting against the plugging boss, and an annular groove is formed between the first inclined plane and the second inclined plane. The female end inner sleeve matched with the plugging boss is detachably connected into the slot of the connector, therebyfilling the gap between the two sides, thereby enabling the structure to be more stable. Meanwhile, the sealing sleeve is arranged in the slot and located below the female end inner sleeve. During thedismounting, the phenomenon that the sealing sleeve falls off is avoided, the inner side wall of the sealing sleeve is provided with the first inclined face and the second inclined face abutting against the plugging boss, so the sealing effect is good.