Abstract: This paper studies the relation of stress-strain by triaxial compression test, the relation between deformation and pressure, and the relation between the coefficient of consolidation and pressure through standard consolidation test, and analyzes the relation between the coefficient of secondary consolidation and consolidation pressure based on Guangxi marine ooze. The test results indicate that the relation of stress-strain of marine ooze is hyperbola; the coefficient of consolidation is a constant after the consolidation pressure exceeds the preconsolidation pressure ; the coefficient of secondary consolidation have nothing to do with the consolidation pressure; the coefficient of secondary consolidation of marine ooze greatly decreases after it is subjected to prepressing, and prepressing could reduce secondary settlement of marine ooze.