Getting drilling samples of different depths of non-saturated red clay ground from the three work places like Quankou，Xianning and Leiyang of the railway line for passenger traffic from Wuhan to Guangzhou，unconsolidated-undrained，consolidated undrained and consolidated drained triaxial tests to the samples are carried on respectively, and the experimental value of the non-saturated red clay's cohesion and the angle of internal friction of these three work places are also obtained，which has provided the design target of red clay sector design of the railway line for passenger traffic from Wuhan to Guangzhou.