In this paper, based on the Ensemble Kalman Filter (EnKF) assimilation system and the advanced variational-based technique, the three-dimensional wind of a tornadic storm occurred in Foshan, Guangdong on September 17, 2018 was examined by assimilating X-band phased array radar data. Results show that after assimilating X-band phased array radar data, both EnKF and variational-based technique can produce vortex characteristics of the tornado-parent storm. However, the vortex intensity produced by EnKF system is stronger, and the three-dimensional wind structure of tornadic storm and its surrounding area is more complete, which matches the reflectivity better. In contrast, the flow field obtained by variational-based technique is not continuous enough, and the vortex intensity is weak, which doesn't conform conceptual model. However, neither EnKF nor variational-based method cannot produce the flow field characteristics of tornado-parent storm when the phased array radar data was not assimilated. In general, compared with the variational method, EnKF assimilation system can produce more reasonable vortex structure after assimilating X-band phased array radar data, and the structure of tornadic storm and its surrounding dynamic field is more reasonable, which provides ideas for the future practical application of X-band phased array radar.