Nowadays in China the construction of infrastructure has been expedited.The methodologies to prevent destruction caused by expansive soil have been put in the frontier. In the present study, a uniaxial compressive strength soil test is conducted. It studies the impact of wasted tire rubber powder content and water content for the mixture uniaxial compressive strength. The test results indicate the characteristics of the improved expensive soil shear strength. They confirm the assumption that wasted tire rubber powder can improve the expansive soil greatly. This finding opens up a new improving method to reduce the engineering disaster caused by expensive soil.