In order to carry out resource treatment for construction waste powder, the paper took construction waste micro whose particle size is less than 0.16 mm as admixture of concrete,according to powder ratio of 0%, 5%, 10%, 15%, 20% ,the cement is replaced by the powder so as to make concrete. In order to explore the effects of the construction waste powder as concrete admixture, it tested ompressive strength, flexural strength, permeability resistance, freeze-thaw cycle both in fresh water and artificial seawater. The result indicated that with the increase of powder mixing proportion, the strength of concrete decreases;the flexural performance, anti-permeability and frost-resistance capability of concrete is optimal when adding proportion of powder is 5% in the five groups of test;water reducer can improve the problem of reducing performance of concrete with large powder adding amount;the utilization of construction waste powder as concrete admixture has environmental protection and economic significance.