A new type of coarse aggregate interlocking concrete was prepared with a new method called scattering-filling aggregate technology.In this type of coarse aggregate interlocking concrete,the coarse aggregates contacted with each other firmly and played a role of strength framework.The strength of the coarse aggregate interlocking concretes increases as the aggregates were drop-filled in the plastic concrete,furthermore the strength of them increased with the replacement ratio increasing from 10% to 30%(by volume).The volume fraction of coarse aggregate in this concrete is much higher than that in the ordinary one.The SEM photograph indicated that interface transition zone of the interlocking aggregate was much tighter than that of the ordinary aggregate in plastic concrete.