Abstract: The subseasonal variability of atmospheric circulation in the mid-to-high latitudes is the direct reason of persistent climate anomalies. As an important component of the atmospheric circulation system in these regions, the upper-level jet stream exhibits subseasonal variations that are closely linked to persistent atmospheric circulation anomalies and weather and climate extremes in China and East Asia. Previous studies on the East Asian upper-level jet have primarily focused on the seasonal and interannual variability of the subtropical jet and its impact on weather and climate. In recent years, building on the clear distinction between the East Asian subtropical jet and the polar front jet, researchers have conducted a series of studies from the perspective of their subseasonal concurrent variability. These investigations have explored the patterns and mechanisms of the subseasonal concurrent variability between the East Asian subtropical jet and the polar front jet, as well as the climatic effects, revealing new insights into their subseasonal concurrent variability and associated climate impacts. This paper provides a comprehensive review of the latest research findings on the subseasonal concurrent variability of the East Asian subtropical jet and the polar front jet, aiming to enhance the understanding of the characteristics and patterns of upper-level jet variability on subseasonal scales over East Asia and contribute to improving short-term climate prediction in China.