The invention discloses recycled concrete, which is prepared from a gel material, a coarse aggregate, a fine aggregate, an admixture, natural river sand and water, wherein the recycled concrete is prepared from the following materials in parts by weight: 300-470 parts of gel material, 900-1200 parts of coarse aggregate, 60-250 parts of fine aggregate, 125-375 parts of recycled modified PET plastic particles, 5-8 parts of admixture and 400-700 parts of natural river sand, wherein the water-binder ratio is 0.3-0.45, and an air entraining agent is 0.01-0.03% of adding quantity of the gel material. According to the recycled concrete, a building material can be reasonably utilized, so that the problems of poor anti-permeability and durability of the recycled concrete in the prior art are solved.