As one of the indices for basic mechanical properties of stabilized soil, elasticity modulus affects structure′s static and dynamic analysis and calculation. So, experimental research on elasticity modulus is of practical significance. In view of few researches on elasticity modulus of stabilized soil and by taking the inde-pendently developed soil stabilizer as a research object, the three factors of soil stabilizer dosages, d ifferent moisture contents and different ages affecting the MBER stabilized-soil′s elasticity modulus are separately studied by laboratory experiment using soil samples collected in Yangling experimental area. A stress-strain relationship curve is obtained from experimental result and the stabilized-soil′s elasticity modulus is found to be between 300and 1 000MPa. The stabilized-soil′s elasticity modulus is increased with the increases in soil stabilizer dosage, moisture content and age and however, it begins to drop down as a threshold value of mois-ture content occurs. By reasonably controlling soil stabilizer dosage and moisture content, mechanical prop-erties of the stabilized soil can be improved for an improved stabilized soil.