The downscaling of optical devices into nanometer scale has the potential to enable exciting technologies such as all-optical computing and ultra-fast optical communications. With the advancements in nanofabrication techniques, confinement and manipulation of light below the diffraction limit have been achieved. However, the realization of ultra-fast and efficient nano light-sources is still a challenge. Utilizing Purcell effect with all-dielectric nanophotonics can be a promising solution to address the limitations. In this context, we offer an all-dielectric silicon hollow nanocuboid structure that can be employed to obtain enhanced magnetic dipole emission. According to the simulation results, silicon hollow nanocuboid provides a strong magnetic resonance and enhances magnetic dipole emission of a source in visible range. In this design, the hollow in the middle of structure supports accessible magnetic hotspots which can interact with magnetic dipole sources to force them emit with a higher decay rate. According to the results, the hollow nanocuboid design has a higher potential to increase the magnetic dipole decay rate enhancement in comparison to the previously reported structures and it can be used as a nano light-source in photonic integrated circuits, all-optical processors, and wideband optical communication networks.