To explore the adaptability of six different Apricot Varieties in Aksu, Xinjiang, and select high-quality varieties to promote the development of apricot industry in Xinjiang. Six Different Apricot Varieties（sugar, green apricot, CK, HTCL3, HTCL4, and HTCL5） were used as experimental materials to study the photosynthetic characteristics under natural high temperature conditions in Aksu, Xinjiang. Pn, Gs, Ci, Tr, WUE and light response curve were measured. The net photosynthetic rate of different cultivars was different in the same time. There was obvious "noon break" phenomenon of photosynthesis, and the net light of sugar, big green apricot, and HTCL4 was obvious.The combining rate showed a single peak curve, and there was no midday depression of photosynthesis. The diurnal variation of environment and physiological parameterization of different apricot varieties were measured and compared. The net photosynthetic rate and transpiration rate of leaves of DQX and HTCL3 were significantly higher than those of other varieties in the same area. Pn of DQX and HTCL3 had no photosynthetic midday rest. Photosynthetic active radiation, transpiration rate, stomatal conductance and atmospheric temperature were the main factors affecting Pn. Environmental adaptability in the Soviet area. By measuring the photosynthetic characteristics and physiological indexes of six species, it was proved that DQX and HTCL3 had strong adaptability and adapted to the growth of Aksu area, which laid a foundation for the selection of apricot trees in southern Xinjiang to obtain better yield.