Method for purifying organic pollutants in deep oil and gas well desulfonation slurry drilling solid waste

The invention relates to the field of petroleum and natural gas extraction, and discloses a deep oil and gas well desulfonation slurry drilling solid waste organic pollutant purification method which comprises the following steps: S1, providing reduced soil containing transition metal oxide; s2, the reduced soil is mixed with newly generated desulfonation mud drilling solid waste; s3, adding an oxidizing agent into the mixture; s4, carrying out photocatalytic oxidation reaction on the mixture under an illumination condition; the transition metal oxide is selected from at least one of TiO2, Fe2O3, MnO2 and ZrO2; the oxidizing agent is hydrogen peroxide or calcium peroxide. The catalytic material and the oxidizing agent used in the method are cheap and easy to obtain, the petroleum pollutants in the drilling solid waste of the de-sulphonating slurry for the deep oil and gas well can be efficiently removed by adopting the method, and the defect of high operation cost in the prior art is effectively overcome. 本申请