The　fatigue　behavior　of　cemented　soil　is　investigated　by　dynamic　loading　test　of　dynamic　asymmetric　sine　wave　load.　According　to　the　result　of　the　test,　the　fatigue　failure　criterion　of　the　cement　-stabilized　soil　stress　space　is　proposed;　and　a　three　parameters　exponential　function　model　of　fatigue　life　model　is　established.　There　are　many　factors　influencing　cement-stabilized　soil　fatigue　life;　the　analysis　results　show　that　the　he　higher　cyclic　load　of　the　stress　level,　the　shorter　the　fatigue　life　of　the　cement-stabilized　soil　is;　longer　on　the　contrary.　Cement-stabilized　soil　age　longer,　cement　ratio　greater,　and　the　fatigue　life　of　the　cement-stabilized　soil　will　be　longer.