South Asia High (SAH) is a strong and steady center of atmosphere activity in summer, which exits at the top of the troposphere and the bottom of the stratosphere over the southern Asia. It is an important member of the subtropical high system and has close relationship with the atmosphere circulation in Northern Hemisphere in summer and weather and climate in Asia regions. There has been a great deal of research findings on South Asia High published in recent years, and the significance of the evolution of South Asia High to weather and climate in China and in Northern Hemisphere is recognized gradually. A review is made for the formation causes, structures, seasonal change, interannual change, and longitudinal oscillation of South Asia High and its influences on weather and climate in China. Meanwhile, the advances in Polar Vortex research in recent years and its relation with SAH are discussed briefly. It is important to reinforce the study of the mutual relations, variation rules and abnormal characteristics of South Asia High and Polar Vortex.