Examples of the disclosure disclose a heat dissipation structure for a lamp, which includes: a base cup, a supporting top cover, a base cup heat dissipation housing, and a top cover heat dissipation housing. The base cup and the supporting top cover are both made of metal, the supporting top cover is detachably connected to the base cup by interference fitting; and the base cup heat dissipation housing and the top cover heat dissipation housing are both made of thermally conductive plastic. In the present disclosure, the supporting top cover and the base cup are connected to each other by interference fitting to form an internal heat conduction structure; the heat is transferred to the outside by the top cover heat dissipation housing corresponding to the supporting top cover and the base cup corresponding to the base cup.