Abstract: This paper gives a brief account of the Three Gorges key water control project, the main technical difficulties in construction,as well as some important problems of engineering mechanics, including fluid mechanics,solid mechanics,two-phase flow and explosion mechanics etc. New problems of rock(rock masses)mechanics concerned with the Three Gorges Project are reviewed here,Geotechnical engineering in a large-scale is ahuge and complicated system and rock(rock masses)mechanics is related with avariety of dis...