The invention relates to the technical field of brick production, in particular, an environmentally-friendly brick. The environment-friendly brick is prepared from the following raw materials in partsby weight: 50 to 70 parts of waste glass powder, 50 to 70 parts of waste ceramic powder, 50 to 70 parts of waste coal slag powder, 40 to 50 parts of reservoir sludge, 30 to 35 parts of building gravel powder, 20 to 25 parts of clay, 6 to 10 parts of an accelerator, 6 to 10 parts of an adhesive and 8 to 12 parts of a degradation agent. The waste glass powder, waste ceramic powder, waste coal slagpowder, reservoir sludge and building gravel powder are used as main raw materials, building wastes and cleaning dirt are effectively recycled, environmental pollution is reduced, and the prepared environment-friendly brick is high in compression resistance, rapid in moulding and good in toughness by adding the clay, the accelerator and the adhesive. The degradation agent is added, through the combined action of photo-degradation and biodegradation, when the environment-friendly brick is discarded, the environment-friendly brick can be directly decomposed, no pollution is generated, the defects of a traditional environment-friendly brick are overcome, the quality of the environment-friendly brick is improved, the cost of the environment-friendly brick is effectively reduced, and the requirements of current development are met.