Abstract: In order to get the cement slurry performance parameters such as viscosity,bleeding rate,solidification body compressive strength,this paper selects two grade of ordinary portland cement-P·O42.5、P·O52.5,six water cement ratio -0.5~1.2 and two kinds of cement admixture-water reducer and setting accelerator to conduct a comprehensive combination test.And it studies the grade of cement,water cement ratio and cement admixture on cement slurry performance improvements.The test results show that,the cement slurry containing 1% water reducer,can significantly reduce the viscosity,and in the premise of good groutability it substantially reduces the water cement ratio,thereby improving compressive strength of cement grout solidification body.