To meet the need of design of vibration grout machine

the paper got a soil dynamic liquefaction discriminant according to the liquefaction datum of earthquakes and experiments in laboratories.Concerned with the factors which affect the soil liquefaction

the discriminant was got with multiple regression and probability analysis.To prove the reliability

the discriminant was returned to original data.The returned result is satisfying（the accuracy rate is 78.8%）

which can meet the requirement for usual geotechnical engineering.The deep analysis made it clear that the relation between vibration characteristic and soil property on the condition of liquefaction could be got by the discrimination

which provides the needed design parameters of vibration grout machine.