This paper has studied the effect of tourmaline powder on the treatment of CODCr in oilfield waste water under different conditions. The result shows that the rate of CODcr degradation is mainly affected by such factors as processing time，quality，particle diameter and aqueous pH. Under the conditions of processing time 60 min，tourmaline powder quality 200 g/L，particle diameter 100μm andpH 9.0， the CODCr of oilfield waste water was reduced to 68.46 mg/L，and the cleaning rate reached 82.25% For the purpose of finding the best treatment conditions，the effect of tourmaline powder on the CODCr in oilfield waste waterwas studied in combination with the means of ultraviolet ray, infrared ray and ultrasonic wave. The results show that these three methods are effective. The treatment rate exceeded 90% when the study was combined with ultrasonic wave, and the processing time was shortened by more than 83% when the study was combined with ultraviolet ray. This experiment has broadened the application field of this kind of environmental mineral material.