The invention provides a down lamp structure. The down lamp structure comprises a surface ring module, a cooling piece, a light source module and a driving module; the lower end of the cooling piece is a first opening end, and the upper end is a second opening end; a heat conducting end in heat conducting connection with the light source module is arranged between the first opening end and the second opening end; first accommodating space for accommodating the surface ring module is formed between the first opening end and the heat conducting end; the second opening end axially extends to the heat conducting end to form second accommodating space; the light source module is arranged in the second accommodating space, and is in butting heat conduction contact with one surface, towards the second opening end, of the heat conducting end; a yielding hole is axially inserted in the heat conducting end; light rays emitted by the light source module are injected into the first accommodating space by the yielding hole; the driving module comprises a driving plate and a driving cover; the driving plate is put in the second accommodating space through the second opening end; and the driving cover is arranged at the second opening end for covering the second opening end.