Abstract: The vertical velocity within mesoscale eddies plays a crucial role in ocean energy and mass transport, carbon-oxygen cycle and eddy dynamics, and thus becomes a hot topic in the research of ocean mesoscale-submesoscale processes. This overview paper aims to review the recent progress in research in this field and systematically summarize the spatial structure, evolution pattern and regulating mechanism of eddy vertical velocities. Numerical modeling and dynamic diagnosis have revealed that the structure and intensity of eddy vertical velocities is highly resolution-dependent. At mesoscale, the vertical velocity within eddies mainly shows a horizontal dipole structure, while strong alternating positive and negative spiral filaments appear in the case of submesoscale resolution. The vertical velocities are generally weak at eddy center but strong at the edge. Vertically, maximum values are mostly found in the subsurface layer. For the temporal evolution of eddy vertical velocities, the results derived from numerical models differ from that derived from observation estimates. On the other hand, evolution of vertical velocities during the eddy lifecycle remains insufficiently characterized. Meanwhile, multiple mechanisms modulate the eddy vertical velocity, including the advection of vorticity, eddy propagation and deformation, submesoscale progresses, eddy-wind interaction, eddy-eddy interaction and topography forcing. Quantifying the relative contribution of these mechanisms to the vertical velocity remains a challenge. Furthermore, the vertical velocity within subsurface intensified anomaly eddies is also worth pursuing.