Abstract: Using the surface sensible heat data over the Tibetan Plateau based the Maximum Entropy Production (MEP), NCEP/NCAR reanalysis data, and meteorological station observations, the quasi-2-year cycle characteristics of the sensible heat over the Tibetan Plateau in July were investigated using the multi-taper-singular value decomposition (MTM-SVD) method. The results show that there is a significant quasi-2-year cycle of July surface sensible heat on the Tibetan Plateau from 1980-2018, which is manifested as an alternating cycle of eastern and western reverse anomalies. As direct influences on sensible heat, surface winds, and ground-air temperature difference contribute positively to sensible heat in the quasi-2-year cycle, with ground-air temperature difference contributing more. The synergistic analysis of atmospheric circulation and SST reveals that, under the typical cycle of the quasi-2-year cycle of surface sensible heat in July on the Tibetan Plateau, the La Ni?a phase appeared in the east-central equatorial Pacific Ocean in the first year of late spring/early summer and gradually developed and strengthened, and then the subtropical high pressure deviated to the north and west and the subtropical westerly rapids deviated to the north in July, which resulted in the anomalous divergence (convergence) of the low level and the anomalous convergence (divergence) of the high level in the east-central (western) Tibetan Plateau and an anomalous sinking (ascending) motion. This form of circulation is unfavorable (favorable) to the generation of clouds in the eastern (western) part of the Tibetan Plateau. The reduction of clouds in the eastern (western) part of the plateau makes the ground receive more (less) solar radiation, which causes an increase (decrease) of the ground-air temperature difference and ultimately leads to a greater (less) sensible heat. In summary, under the quasi-2-year cycle of July sensible heat on the Tibetan Plateau, in the first year, La Ni?a is strengthened, the subtropical high pressure in the western Pacific Ocean is to the north and west, and the subtropical westerly rapids in East Asia are to the north, so that the surface sensible heat on the Tibetan Plateau is strong in the east and weak in the west. The anomalies of the atmospheric circulation and the SST in the second year are opposite to those in the first year, so that the surface sensible heat on the Tibetan Plateau is transformed to be weak in the east and strong in the west.