On the basis of experiments, three types of original concrete were prepared which have high, medium and low strength respectively. The recycled concrete aggregate were obtained by crushing and grading original concrete manually. A series of physical properties of the three recycled concrete aggregate(coarse and fine) and the original concrete aggregate(coarse and fine) were tested. As is shown by the results, the properties of recycled concrete aggregate are different from those of original concrete aggregate; the differences of the properties among the recycled concrete aggregates which were prepared with the same raw materials are very litter, which is meaningful to control the fluctuation of the quality of recycled concrete aggregate as well as recycled concrete.