Preparation method of deep sea soft clay simulation sample for geotechnical test

The invention belongs to the field of geotechnical testing of ocean geotechnical engineering, and relates to a preparation method of a deep-sea soft clay simulated soil sample for geotechnical testing, which comprises the following steps: 1) obtaining an original sample of real deep-sea soft clay in a sea area to be researched, and carrying out physical and mechanical property test on the original sample; 2) selecting the number of physical and mechanical indexes to be evaluated and the types of raw materials in the simulation sample; (3) taking kaolin as a basic framework of the simulated soil sample, and firstly determining the mixing amount ratio of other raw materials except the kaolin; 4) calculating the mixing amount of kaolin; 5) preparing a simulated soil sample, and carrying out a determination test of selected physical and mechanical indexes; and 6) evaluating the difference between each physical and mechanical index of the simulated soil sample and the original sample, wherein the error is not more