The invention relates to the technical field of building materials, in particular to a foaming-free environment-friendly ceramsite for buildings. The foaming-free environment-friendly ceramsite comprises ceramsite, and is prepared by the following steps of adding any raw material of ceramic waste mud, sulfate residue and sewage treatment residue into iron ore waste residue, mixing with clay according to ratio, and sintering into the ceramsite at high temperature of 1000 to 1300 DEG C. The foaming-free environment-friendly ceramsite has the advantages that the wastes can be recycled, the production cost is low, the foaming material is reduced or is not needed, and the environment-friendly and energy-saving effects are realized.