An operational challenge in using Doppler radar velocity field is that velocity measurements are often aliased. The experiments of velocity dealiasing are developed by introducing an Automated 2D MultiPass Doppler Radar Velocity Dealiasing Scheme from Zhang Jian (NSSL in USA) into typhoon data and severe convective storm data from Doppler radar (SA and CB) in China. This paper analyzed the characteristics of the new algorithm in detail, and proposed the schemes of data preprocessing. The results showed that the new algorithm from Zhang Jian could not only perform continuous velocity fields, but also possess improvements in regions near data voids and range folded observations. However, it has also disadvantages for isolated echo. At the same time, it is found that AP (anomalous propagation) clutters may affect the effect of the dealiasing. 