Splitting tensile strength is an important mechanics index of evaluation of concrete crack resistance.We analyse influence of sandstone powder content of manufactured sand on tensile splitting strength and mechanism of sand concrete.The results show that the content of sandstone powder of manufactured sand has different influence on the workability,tensile splitting strength properties for different strength grades concrete.When contents of sandstone powder are from 7% to 13% and from 5% to 8%,the fresh concrete workability,compressive strength,and tensile splitting strength of concrete are improved.Mathematical formula splitting tensile strength and compressive strength are established:lg fsp=0.309 7lg fcu+0.102 6.Splitting tensile strength of manufactured concrete is better than ordinary concrete,and it has more excellent crack resistance.Particle effects and chemical activity of sandstone powder are the main reasons for improving splitting tensile properties of sand concrete.