The utility model relates to the technical field of electronic ballasts, and particularly relates to an electronic ballast shell structure. The electronic ballast shell structure mainly comprises a lower box seat, an upper box cover, mounting plates, a protective net and a cooling fan, wherein the lower box seat and the upper box cover are connected via a bolt; the mounting plates are fixed at two side faces of the bottom part of the lower box seat; a fan mounting groove is arranged at the top part of the upper box cover; the cooling fan is mounted inside the fan mounting groove; and the side faces around the ballast shell which is formed by the lower box seat and the upper box cover in a connection way are provided with cooling holes. After adopting the above scheme, the electronic ballast shell structure has the biggest advantages that the cooling performance of the electronic ballast is better, the mounting position of a large-power electronic component is not restrained, a cooling piece is not needed to be mounted any more, the cooling fan can be disassembled individually in the process of maintenance and updating, the shell does not need to be disassembled, and therefore the working efficiency is improved, the labor intensity of workers is reduced, and the protective net can well play the role of protecting the cooling fan and the electronic component.