Through unconsolidated undrained triaxial creep test, established Tianjin marine soft soil Singh-Mitchell creep model, simultaneously used the measured data to carry on the gray forecast. The test result indicated that: the Singh-Mitchell experience model can predict creep of Tianjin marine soft soil, using measured data can also carry on the short-term grey prediction of Tianjin marine soft soil, the effect is good,which can take the reference for the project practice.