Abstract: The mud powder in artificial sand has adverse effects on the mechanics, drying shrinkage and durability of concrete.In order to provide reasonable suggestions for the production and use of artificial sand, artificial sand concrete with different mud content or MB value(methylene blue value) was prepared by using fixed mix ratio, and the influence of mud powder in artificial sand on concrete performance was studied and summarized from four aspect: concrete strength, elastic modulus, drying shrinkage performance and durability.The results show that with the increase of MB value of artificial sand, the performance of concrete tends to deteriorate, and the higher the strength grade, the greater the impact on concrete.The critical values of MB value of artificial sand on compressive strength, drying shrinkage, durability and elastic modulus of concrete are about 1.2,1.4 and 2.1 respectively.