A heating member for an atomizing device with different heating effects at different portions, configured to heat and atomize liquid, wherein the heating member is tubular, wherein the heating member comprises two electrode portions respectively disposed at two ends in the axial direction and a heating circuit portion electrically connected between the two electrode portions, wherein the heating circuit portion comprises a group of first connecting portions, a group of second connecting portions, a group of third connecting portions and a group of fourth connecting portions disposed sequentially in the circumferential direction, wherein the group of first connecting portions comprises a plurality of first connecting portions spaced along the axial direction, the group of second connecting portions comprises a plurality of second connecting portions spaced along the axial direction, the group of third connecting portions comprises a plurality of third connecting portions spaced along the axial direction, and the group of fourth connecting portions comprises a plurality of fourth connecting portions spaced along the axial direction; and wherein the axial dimensions of the first connecting portion and the third connecting portion are larger than the axial dimensions of the second connecting portion and the fourth connecting portion, each first connecting portion connects two adjacent second connecting portions and two adjacent fourth connecting portions, each third connecting portion connects two adjacent second connecting portions and two adjacent fourth connecting portions, so that the first connecting portions, the second connecting portions and the third connecting portions are connected to form a first circuit, and the third connecting portions, the fourth connecting portions and the first connecting portions are connected to form a second circuit, and the first circuit is connected in parallel with the second circuit, and when the electrode portions are powered on, the first circuit and the second circuit generate heat, characterized in that the heat of a radial side of the heating member per unit time is less than that of another radial side of the heating member per unit time; wherein the heating member comprises a radial dimension between 1 mm and 17 mm, an axial dimension between 2 mm and 33 mm, and a wall thickness between 0.02 mm and 0.9 mm. an atomizing device with different heating effects at different portions, configured to heat and atomize liquid, wherein the heating member is tubular, wherein the heating member comprises two electrode portions respectively disposed at two ends in the axial direction and a heating circuit portion electrically connected between the two electrode portions, wherein the heating circuit portion comprises a group of first connecting portions, a group of second connecting portions, a group of third connecting portions and a group of fourth connecting portions disposed sequentially in the circumferential direction, wherein the group of first connecting portions comprises a plurality of first connecting portions spaced along the axial direction, the group of second connecting portions comprises a plurality of second connecting portions spaced along the axial direction, the group of third connecting portions comprises a plurality of third connecting portions spaced along the axial direction, and the group of fourth connecting portions comprises a plurality of fourth connecting portions spaced along the axial direction; and wherein the axial dimensions of the first connecting portion and the third connecting portion are larger than the axial dimensions of the second connecting portion and the fourth connecting portion, each first connecting portion connects two adjacent second connecting portions and two adjacent fourth connecting portions, each third connecting portion connects two adjacent second connecting portions and two adjacent fourth connecting portions, so that the first connecting portions, the second connecting portions and the third connecting portions are connected to form a first circuit, and the third connecting portions, the fourth connecting portions and the first connecting portions are connected to form a second circuit, and the first circuit is connected in parallel with the second circuit, and when the electrode portions are powered on, the first circuit and the second circuit generate heat, characterized in that the heat of a radial side of the heating member per unit time is less than that of another radial side of the heating member per unit time; wherein the heating member comprises a radial dimension between 1 mm and 17 mm, an axial dimension between 2 mm and 33 mm, and a wall thickness between 0.02 mm and 0.9 mm.