Based on the statistical analysis of echo structure of severe convective storms in Guangzhou du-ring 2015-2017, a network of phased-array polarimetric Doppler radar has been set up, which can entirely cover the central district of Guangzhou. The main purpose is to obtain high-resolution radar datasets of severe meso- and micro-scale convections, which would be helpful for further analyzing structure and the formation, dispersal mechanism of these storms. Meanwhile, it could contribute to understanding the effects of urban canopy on the local meteorological field and the linear convection systems such as squall lines. The results of field experiment show that the high-resolution radar datasets from phased-array radar have great advantages in monitoring development of local meso- and micro-scale convections, and the evolution of local intensity of linear convection systems. It would greatly help to increase the accuracy and timeliness of early warning and other operations. The poor side is that the phased-array radar scans with a single beam, which makes it difficult to further accelerate the scanning speed.