The utility model discloses a hoisting mechanism which comprises a fixed base as well as a sliding block and a traction rope which are arranged on the base in a sliding manner, wherein a sealed sliding groove is formed in the vertical direction of the base; a convex column in match with the sliding groove is arranged at the lower part of the sliding block; a first bearing is arranged on the base in the convex direction of the convex column; the first bearing is arranged at the upper part of the base and is positioned on one side of the sliding groove; a mounting piece is arranged on the convex column; a first lug is arranged on one side of the lower part of the mounting piece close to the first bearing; a second lug is arranged on one side of the upper part of the mounting piece far away from the first bearing; the first lug and the second lug respectively have a first through hole and a second through hole in match with the traction rope; the traction rope is sleeved on the first bearing from the part above the first bearing, extends downwards, penetrates through the first through hole, comes around the convex column and subsequently penetrates out from the second through hole. The utility model further discloses a hearth structure which is arranged by utilizing the structure. According to the hearth structure disclosed by the utility model, the height of a hearth can be adjusted through sliding block motion, and the height of the hearth can be adjusted according to different pots, so that the heating effect and the cooking smoke suction effect in the cooking process are good.