Abstract: In this paper, the evolution features of monsoon circulation over East Asia and Australia are investigated using ECMWF gridpoint data and OLR for Nov.16, 1982-March 15, 1983.An analysis is carried out of monthly mean wind fields during prevailling monsoon period and a comparison of flows is also made between monsoon active and break phases over Australia.The results show that the evolution of the monsoon circulation in winter exhibits quasi 30-50 day oscillations.The major features are the variations in intensity of local Hadley circulation cell as well as an east-west movement of the Australian monsoon trough and of the Pacific High over Northern Hemisphere.