Abstract: In this study, the consolidation of inelastic clays under cyclic loading is investigated. For simple calculations, an approximate semi analytical method is presented. Presented method is based on a time transformation method and superimposing rule to solve the consolidation problem of inelastic soils under cyclic loading. Changes of material properties are applied in the solution by modification of loading and unloading duration by introducing a time transformation. A set of continuous static loads in specified times used instead of cyclic loading based on the superimposing rule. More than 20 laboratory tests are performed in order to verify the presented method. Accuracy of the presented method as a function of material properties and loading conditions is investigated.