We analyzed the contents of nine mineral elements in soil，the characteristics of absorption and accumulation of the mineral elements in cotton plants，and input-output quantity of the mineral elements in different continuous cropping cotton fields, and the object of this study was to explore the characteristics of biological cycling of mineral elements in soil-cotton system.The results showed that microelements and macroelements in soil of the cotton fields had leanness trend, especially Mo. Different organs of cotton plants had different ability to accumulate mineral elements.The higher contents of Ca，Mg and Mn in the leaves and K，Na，Fe and Mo in the roots and stems, and the highest contents of Zn and Cu in the cotton seeds were observed in the study.Different crop organs had different absorption and accumulation ability to mineral elements. The patterns of the absorption and accumulation ability of straw, Fibre, and cotton seed were Mo＞K＞Mg＞Ca＞Cu＞Zn＞Na＞Mn＞Fe, Mo＞K＞Mg＞Zn＞Cu＞Ca＞Na＞Mn＞Fe，and Mo＞Zn＞K＞Mg＞Cu＞Ca＞Mn＞Na＞Fe, respectively.The strong deleption of Mo in soil is caused by a long-term continuous cropping, and therefore cotton plants have the strongest absorption ability to Mo.Because cotton seeds are harvested，quantities and ratio of Zn and Cu have output much more，and thus Mg and K, as macroelements, also have higher output in the cotton fields.Cotton plants absorb a lot of Mn，Fe，Ca and Na, but they are most accumulated in the straws. When straws are turned to soil, the mineral elements in soil will be rich in the cotton fields. Cotton is solid-plantings for the long term in XinJiang, and therefore, it is often necessary to add some matures, which are rich in microelements, such as Mo,Zn and Cu and macroelements, such as Mg and K, to the soil. The contents of Ca and Na in Xinjiang background soil is higher than those in cotton soil. This indicates that cotton soil is developed to less salinization. However，the ratios of Ca and Na are higher in the straws of cotton plants，we should take measure to protect desalinization in continuous cropping in XinJiang.