Abstract: Deterioration depth is a relatively simple index to evaluate the deterioration degree of solidified soil. The practical prediction method of deterioration depth of solidified soil is in the form of power function, based on the results of conventional deterioration tests, while the longer the corrosion time and the deeper the deterioration depth is, the more accurate the prediction results will be. The deterioration of solidified soil is a lengthy process, and the accelerated deterioration test for high concentration corrosive media can shorten the test period and obtain rapid prediction of deterioration depth. The deterioration test results of cement solidified marine soft soil indicate that there was a linear relationship between the 28 days accelerated deterioration test of erosion soil prepared with 3 times seawater concentration and the 360 days deterioration depth of the conventional deterioration test. Then based on the equivalent relationship between them and the power function formula for predicting the deterioration depth, a rapid prediction method for the deterioration depth of cement stabilized marine soft soil was proposed, and the predicted development trend of deterioration depth was consistent with the measured results. The rapid prediction method for the deterioration depth of solidified soil based on the accelerated deterioration test results in the power function form was feasible and practical. The research idea had certain reference significance for the research of similar deterioration problems.