A cover body assembly for an electric cooker and an electric cooker having same. The cover body assembly comprises a cover body (1), a cover plate (2), a sealing component (3) and a heating member (4). The cover plate (2) is arranged on the inner side of the cover body (1). Vent holes (221) penetrating the cover plate (2) are formed in the cover plate (2). The sealing component (3) is arranged between the cover body (1) and the cover plate (2), so that an accommodating cavity (201) is defined by the sealing component (3), the cover body (1) and the cover plate (2) together. The accommodating cavity (201) is communicated with the vent holes (221). The heating member (4) is arranged on the cover body assembly and is used for heating the accommodating cavity (201). According to the cover body assembly, the sealing component (3) is arranged in the gap between the cover plate (2) and the cover body (1), and the accommodating cavity (201) is defined by the sealing component (3), the cover plate (2) and the cover body (1) together, so that steam in the electric cooker can be effectively recycled, and additional cooking and water supplement are achieved. By constructing the accommodating cavity in this manner, the cover plate (2), the cover body (1) and the space between the cover plate (2) and the cover body (1) can be used ingeniously, the structure of the cover body assembly is more compact, and the cover body assembly can be obtained conveniently.