Abstract: Based on the fundamental theories of fuzzy mathematics, the factors which influence silts liquefaction are analyzed.The average particle diameter,relative density,SPT blow counts of the silt and the effective overloading are selected as the evaluation index to construct the model of fuzzy pattern recognition for the silt liquefaction discrimination.The verification and application of the model indicate that this methodology is a effective tool in objectively evaluating and predicting the liquefaction potential of silt.