Magnetic core structure of electronic transformer and electronic transformer

The utility model discloses a magnetic core structure of an electronic transformer and the electronic transformer, a first magnetic core body comprises a first shell and a first middle column, a second magnetic core body comprises a second shell and a second middle column, the end face of the first shell and the end face of the second shell are overlapped, and the end face of the first middle column and the end face of the second middle column are overlapped; the side face of the first middle column forms the side face of the containing cavity and comprises a first semi-cylindrical face, a second semi-cylindrical face and two first planes, wherein the first semi-cylindrical face and the second semi-cylindrical face are oppositely arranged, and the two first planes are connected with the first semi-cylindrical face and the second semi-cylindrical face. The side face of the second middle column comprises a third semi-cylindrical face, a fourth semi-cylindrical face and two second planes, wherein the third semi-