Abstract: A circuit module and a shielding structure for electromagnetic waves or radio frequency interferences are comprised of a circuit board and electronic components disposed on the circuit board, and a metal partition mounted on the electronic components; the metal partition disposed with one or a plurality of through holes, which does not contact the electronic components so as to shield electromagnetic waves or radio frequency interferences externally radiated from the electronic components, or radiated from an external source by the conductivity of the metal partition; and the through hole dissipates heat generated by the electronic components to maintain normal working status and quality of the circuit module.