Carbon and oxygen isotopes of carbonate strata in Liaohe Group, Zhongtiao Group and Wanzi Group were studied in this paper. The δ¹³C_PDB values of banded marble in Wangjiagou Formation of Liaohe Group vary from-1.02‰ to 3.14‰, mostly in the range of 0.16‰～1.79‰. The average δ¹³C_PDB is 1.07‰, which is higher than the average δ¹³C_PDB of marine carbonate. The δ¹⁸O_PDB values of Wangjiagou banded marble vary from -17.2‰ to -10.1‰, mostly in the range of -13.4‰～-10.1‰. The average δ¹⁸O_PDB is -11.9‰. The δ¹³C_PDB values of Yujiashan marble in Zhongtiao Group vary from -0.2‰ to 0.8‰, mostly in the range of 0～0.3‰. The average δ¹³C_PDB of fourteen samples along one section is 0.34‰, slightly lower than the average δ¹³C_PDB of marine carbonate. The average δ¹³C_PDB of the next sixteen samples along another section is 0.54‰, basically consistent with the average δ¹³C_PDB of marine carbonate. The δ¹⁸O_PDB values of Yujiashan marble vary from -7.9‰ to -6.1‰. The average δ¹⁸O_PDB of the first fourteen samples and the second sixteen samples are -6.80‰ and -6.88‰ respectively, with no obvious difference. The δ¹³C_PDB values of Songjiakou marble in Wanzi Group vary from 1.0‰ to 3.8‰, 2.65‰ on average, which is higher than the average δ¹³C_PDB of marine carbonate evidently. The δ¹⁸O_PDB values of Songjiakou marble vary from -8.8‰ to -5.7‰, -6.97‰ on average. The results show that all the studied marbles were formed in a comparatively stable but fluctuating environment. There existed seasonal variations of sea level and climate but no sudden drastic event during the marble sedimentary period. As to the Jatulian event, marbles in Songjiakou Formation showed response but marbles in Yujiashan formation had no response to it. The effect on Wangjiagou Formation is uncertain. This study has also proved that the Jatulian event was a global event that had extensive influence in space but could serve as an eruptive event in time scale.