Cement stabilized gravel as a semi-rigid material, with its high integrity, high capacity, high rigidity, water stability and good characteristics are widely used in highway subgrade pavement. In order to ensure cement stabilized gravel road base and meet the design requirements, in addition to rational design structure, roadbed strength to meet the requirements, the focus is the selection of raw materials of cement stabilized gravel road base, with the composition ratio of mixture design and construction quality control.