Based on the characteristics of quality of pile with bearing base difficult to control,the influencing factors of pile quality are analyzed,and the reduction model of influencing factors is established according to the rough set theory.With the example of the pile project with bearing base in Handan city,the minimal influencing factors set are obtained,and the core influencing factors of pile with bearing base quality are built,which provides theoretical basis for quality prediction and the control of pile with bearing base.The results show that the method overcomes the subjective and qualitative factors and achieves with high reliability.