Using the conventional data and grid data of T213 ,this paper analyses the synoptic and dynamic features of the upper-level and the low-level jet streams which are the main influential systems giving rise to the heavy rain in Shaanxi during 24Aug.～7Sept. 2003 and the relationships between the jet streams and the persistent rainstorm. The results show that there is advantageous configuration between the upper jet stream , the South Asia high and the low-level south wind or the low-level jet stream that is important mechanism for the secondary circulation maintaining ,convection continuing and rebuilding.