ELECTRONIC ATOMIZATION DEVICE, AND ATOMIZER AND HEATING ASSEMBLY THEREOF

An electronic atomization device, and an atomizer (1) and a heating assembly (10) thereof. The heating assembly (10) comprises a porous body (11) and heating bodies (12a, 12b, 12c, 12d, 12e). The porous body (11) comprises a first surface (1111) and a second surface (1121) which are provided opposite to each other; the first surface (1111) is an atomization surface (1111) for mounting the heating bodies (12a, 12b, 12c, 12d, 12e); the second surface (1121) is recessed inwards to form a liquid guide hole (1122) for accommodating a liquid guide element (20), and the liquid guide hole (1122) comprises a bottom surface (1123). A projection area of the bottom surface (1123) of the liquid guide hole (1122) in the atomization surface (1111) is a core atomization area (A), and the core atomization area (A) is a centralized distribution area of the heating bodies (12a, 12b, 12c, 12d, 12e). During normal working, after the heating bodies (12a, 12b, 12c, 12d, 12e) performs heating for a preset time period, a first average temperature of the core atomization area (A) is higher than a second average temperature of the whole atomization surface (1111). When the heating assembly (10) performs heating, the temperature of the core atomization area (A) is high and a liquid medium volatilizes fast, so that the liquid medium outside the core atomization area (A) can flow to the core atomization area (A) and is gathered towards the core atomization area (A), thereby avoiding liquid leakage.