The invention discloses a method for preparing concrete by using basalt micropowder-slag micropowder-limestone powder as a blending material. The method is characterized in that (1), raw materials consist of a gelatinizing material, an exciting agent, aggregate, additives and water, wherein the gelatinizing material is formed by compounding cement, basalt micropowder, slag micropowder and limestone powder; and the additives comprise an alkaline exciting agent and a high-efficiency water-reducing agent; (2), the specific surface area of the basalt micropowder, the slag micropowder and the limestone powder is controlled to be 400 to 600 m<2>/kg, 500 to 800 m<2>/kg and 600 to 900 m<2>/kg respectively; (3), small-size continuous grading coarse aggregate is adopted; and (4), the exciting agentis dissolved into water in advance and is mixed with the mixing water. By the method, the process is simple; concrete of C20-C60 grade can be prepared; the adding amount of industrial residues in theconcrete can be increased obviously; the concrete has high work performing; and durability such as shrinkage resistance, freezing resistance, seawater erosion resistance and the like is improved obviously.