Heat dissipation structure of LED lamp

The utility model relates to the technical field of heat dissipation structures, in particular to a heat dissipation structure of an LED lamp, which comprises a lamp holder, a lamp cup, a heat dissipation mechanism and a cleaning mechanism, the cleaning mechanism comprises a slip ring, a rotating ring, a cleaning brush, a shifting assembly and a dust collector; when a certain amount of dust adheres to the outer side wall of the lamp cup, the sliding ring slides in the direction of the lamp cup till the sliding ring covers the lamp cup, at the moment, the cleaning brush on the rotating ring makes contact with the outer side wall of the lamp cup, the rotating ring is stirred through the stirring assembly to rotate on the inner side wall of the sliding ring, and then the lamp cup is cleaned. When the lamp cup is used for a long time, the rotating ring drives the cleaning brush to rotate along the outer side wall of the lamp cup, dust adhering to the outer side wall of the lamp cup is swept away, the dust collect