The invention discloses a color-changing LED lamp bar. The color-changing LED lamp bar comprises a belt-shaped circuit board, a lamp bead, a lamp bead accommodating cavity and a colored hood. The lampbead is arranged on the upper surface of the belt-shaped circuit board. The lamp bead accommodating cavity is formed in the surface of the belt-shaped circuit board. The maximum inner diameter of thegeometrical shape of the intersection position of the lamp bead accommodating cavity and the belt-shaped circuit board is less than the diameter of the lamp bead. The colored hood is nested on the inner side of the lamp bead accommodating cavity. The lamp bead is arranged on the inner side of the colored hood. Two protruding-point-shaped objects are arranged on the largest tangent plane, in the horizontal direction, of the colored hood. Concave holes are formed in the positions, corresponding to protruding points, of the lamp bead accommodating cavity. Two or more color displaying areas of different colors are evenly arranged on the colored hood. The superficial areas, occupied by all the color displaying areas, of the colored hood are the same. According to the color-changing LED lamp bar, by arranging the colored hood with multiple colors and capable of rotating outside the lamp bead, adjusting of the color of a hood body on the outer side of the lamp bead is achieved by rotating the colored hood during using, and thus the effect of color changing of the LED lamp bar is achieved.