Abstract: Physical property of Kazakhstan Crude Oil and Kazakhstan and Tarim Mixing Crude Oil is analyzed. The result shows that the content of wax in the mixing crude oil is low and its gel and asphalt are high. The anormal point of Kazakhstan Crude oil and Tarim Mixing Crude Oil is 10 ℃ lower than that of Kazakhstan Crude oil. According to analysis data from Shanshan Initial Station, PPD improver exhibits a poor effect on Kazakhstan and Tarim Mixing Crude Oil. The data from other stations show that the modified PPD improver exhibits a certain effect on the mixing crude oil. Especially, the pour point of the crude oil from Zhangye and Xijing Station maintains at －2~0 ℃ when the modified PPD improver was injected at Yumen Station. Advice about crude oil transport technique and sampler design is given based above research.