Hydrous titanium oxide (HTO) is a better inorganic absorbent for the extractionof uranium from sea water. Although its structure has been proposed by some authors,little attention has been paid to the relation between the structure and the property ofuranium-untaking. Some relevant articles only concentrated their efforts on the in-terior structure and little was given to the investigation of its surface properties whichplay an important part in the property of uranium-uptaking. Hydrogenated titanium oxide (HTO) is a better inorganic absorbent for the extraction of uranium from sea water. However, some structure has been proposed by some authors, little attention has been paid to the relation between the structure and the property ofuranium-untaking. only concentrated their efforts on the in-terior structure and little was given to the investigation of its surface properties which play an important part in the property of uranium-uptaking.