Method for judging carbonate rock redox sedimentary environment through ratio of < 187 > Re/< 188 > Os

The embodiment of the invention provides a method for judging a carbonate rock redox deposition environment through a ratio of 187Re/188Os. The method comprises the following steps: collecting a carbonate rock sample; the method comprises the following steps: sequentially carrying out pre-selection, sample dissolution and separation and purification on a carbonate rock sample to respectively obtain a purified Re solution and a purified Os solution; carrying out Re-Os isotope measurement on the purified Re solution and the purified Os solution to obtain a ratio of 187Re to 188Os; performing logarithmic function calculation on the obtained 187Re/188Os ratio to obtain an Lg (187Re/188Os) value; and judging the carbonate rock redox deposition environment according to the Lg (187Re/188Os) value. The 187Re/188Os ratio is creatively put forward to serve as an index for judging the carbonate rock redox deposition environment, the judgment index of the carbonate rock redox deposition environment is expanded, and judgm