The main technical problems that should be considered in the design of hydro-turbine generating units of Three Gorges Project (TGP) are analyzed;the key technical researches performed are summarized,and the parameters of hydro-turbine generating units are optimized through the study on key technical problems.The unit operation indicates that the performance of the hydro-turbine generating units is excellent,and the units can operate in a safe,stable and highly efficient mode for a long term.Therefore,it is verified effectively that the general technical design of units is scientific and rational. The main technical problems that should be considered in the design of hydro-turbine generating units of Three Gorges Project (TGP) are analyzed; the key technical researches performed summarized, and the parameters of hydro-turbine generating units are optimized through the study on key technical problems.The unit operation indicates that the performance of the hydro-turbine generating units is excellent, and the units can operate in a safe, stable and highly efficient mode for a long term.Therefore, it is verified that that general technical design of units is scientific and rational.