How to reconstruct time-height profile of radar reflectivity and other parameters using Volume Coverage Pattern (VCP) data to improve its vertical resolution and make it suitable for cloud microphysical research is one of popular topics in radar meteorology in recent years. Based on the volume scan data of X-band dual polarization radar with high resolution, this paper improves the column vertical profile (CVP) algorithm by varying the selection of target area, so that it can be applied to rapidly developing convective clouds and locally generated cloud with small horizontal scale. The comparison with cloud radar shows that for the local precipitation in the plateau area, the basic reflectivity (ZH) vertical profile reconstructed by modified CVP with a small area composed of 5km (radial range)×10° (azimuth coverage) can reasonably reflect the characteristics of generating cells in the high level, the gradual decreasing of ZH from high layer as well as the gradual increasing of ZH toward low layer. For the vigorous developed convective cloud in North China, the area selection strategy of original CVP was improved by adopting the varying selected radial range for high and low elevation layers. New vertical profile of ZH significantly avoids the “zig-zag” structure caused by the relatively uneven horizontal distribution of the low-level echo, while it can still maintain main characteristics of the high-level echoes of convective cloud in the vigorous developing stage as well as the transformation of cloud structure at different stages. Furthermore, comparing reconstructed results of modified CVP and original CVP, new time-height series of different polarization parameters shows cloud microphysical characteristics changing over time accurately, revealing convection generating-cells mechanisms of formation and its seeding effect on plateau; Vertical distribution characteristics of polarization variables varing with time in mature stage of convective cloud in North China could also be displayed.