The Tibetan Plateau (TP) is well known for its unique summer monsoon structure driven by thermal air pumping. This structure is characterized by low-level convergence and upper-level divergence. Based on JRA-3Q reanalysis data, this study proposes an Index named Pumping Plateau Monsoon Index (PPMI). This index is defined as the divergence difference between 200 hPa and 600 hPa and is used to characterize the intensity of the TP thermal pumping effect and its associated three-dimensional circulation structure. The results show that the PPMI is significantly correlated with the TP heat source, the east-west displacement of the South Asian High (SAH), and circulation changes over the East Asian Summer Monsoon (EASM) region. During weak Tibetan Plateau Summer Monsoon (TPSM) years, an anomalous anticyclonic circulation is observed over the Iranian Plateau, which is associated with a westward displacement of the SAH toward the Iranian High mode. In contrast, strong TPSM years correspond to a cyclone–anticyclone–cyclone–anticyclone wave-train-like pattern extending from the Iranian Plateau and the TP to eastern China and the Korean Peninsula (KP). The associated upper-tropospheric circulation anomalies over the IP favor changes in the meridional potential vorticity gradient and are accompanied by bifurcation of the Rossby wave train, weakened eastward propagation, and reduced downstream wave activity energy transport. When the TPSM intensifies, anomalous descending-ascending-descending-ascending motion develops from the IP and the TP to Eastern China and the KP. These vertical motion anomalies further modulate the East Asian Trough and moisture transport over the EASM region. Further analyses of the intraseasonal evolution of TPSM and EASM precipitation indicate that the TPSM related teleconnection exhibits nonlinear characteristics. Specifically, the positive phase in June is characterized by decreased precipitation over Eastern China and increased precipitation over the KP, whereas the opposite pattern appears in July-August. This study reveals an important dynamical linkage through which TPSM thermal forcing influences EASM circulation anomalies. The results provide a new perspective for understanding the relationship between TPSM and East Asian summer climate and sub-seasonal variability.