As a first page of soil mechanics, calculate the physical properties of soil. Drawing the particle size distribution curve directly by replacing data and derive coefficient of uniformity. From the weight-volume relation, calculate the void ratio, water content, saturation and unit weights. Using the data of atterberg limit, take plastic index. Finally, judge the soil type according to the unified soil classification system. The Mohr's circle is given to show the relations between actual stress conditions and principal stress. Through the understanding of mohr's circle, it would be easier to know consolidated undrained test's meaning.