The invention discloses an LED projection lamp structure. The LED projection lamp structure comprises an upper supporting plate, an LED lamp body is arranged in the middle of the upper supporting plate, and the LED lamp body is detachably connected with the upper supporting plate; U-shaped supports are vertically arranged on the positions, close to the two ends, of the upper supporting plate, thebottoms of the U-shaped supports penetrate through the upper supporting plate, and adjusting bolts are arranged on the bottoms of the U-shaped supports; one ends of the adjusting bolts are connected with the U-shaped supports, and the other ends of the adjusting bolts are located on a control board; and two conductor joining columns are arranged, a nano coating is transversely arranged between thetwo conductor joining columns, and the two ends of the nano coating penetrate through the two conductor joining columns to be arranged on the control board. The LED projection lamp structure is compact in structure, good in supporting performance and convenient to adjust, the control performance is high, the internal heat can be effectively dissipated, and meanwhile, the high temperature resistance, oxidation resistance and corrosion resistance can be improved to a certain extent; and the service life of the projection lamp can be well prolonged, and the number of times of maintenance and replacement can be reduced.