An adjustable LED street lamp comprises a fixing cavity. An integrally formed hoop is arranged in the fixing cavity and used for fixing a lamp pole into the fixing cavity. The hoop comprises two end faces in bilateral symmetry and a middle face, wherein the middle face is located between the two end faces and is in an arch shape, the outward face of the middle face is an outer convex face, and the inward face of the middle face is an inner concave face; the outer convex face and/or the inner concave face is provided with a fastening area; and the fastening area is provided with a paint removal structure used for removing paint coating the lamp pole through nipping, a metal layer in the lamp pole is made to be in contact with the hoop directly, and accordingly, the adjustable LED street lamp can be grounded through the lamp pole. By means of the hoop in the LED street lamp, the lamp pole in the hoop is more stable and firmer.