Abstract: The most Francie turbines are installed in the hydro power station from head of 20m to 750m.The turbines designed and manufactured in the 70th～90th of the twentieth century have operated for many years of 30 to 50 years.The quality of turbine performance, operating limits, parts and auxiliary devices have not able to meet modern electrical market requirements.The Francis turbines need to carry out updating and reconstruct with modern technology.