The invention provides a heat dissipation structure of an electronic device and a radiator housing and belongs to the electronic device field heat dissipation structure field. The heat dissipation structure of the electronic device comprises a radiator main body having an electrical component mounting cavity; electrical components are disposed in the electrical component mounting cavity; the radiator main body is provided with heat dissipation sheets and a radiator fixing structure; one side of the radiator main body, which faces the height direction of the heat dissipation sheets, is providedwith a mounting seat; the height of the mounting seat is not smaller than the height of the heat dissipation sheets; the radiator fixing structure is arranged on the mounting seat; and one side of the radiator main body, which faces a direction opposite to the heat dissipation sheets, is provided with a detachable cover plate enclosing the electrical component mounting cavity. With the heat dissipation structure of the electronic device of the invention adopted, the problem of inconvenient assembly and maintenance of an existing heat dissipation structure of an electronic device can be solved.