Abstract: As one of the methods of utilizing solid waste to develop building materials, the technology of using incineration slag to produce baking-free bricks has a promising future. Based on the study of basic properties of slag, this paper discusses the influences of technological conditions such as pretreatment, raw material composition and curing methods on the compressive strength and environmental performance of bricks. The results show that the ignition loss is 1.2%, and the phase composition of slag is similar to natural aggregate. However, the water-soluble chloride content is 8 times the limit of Code for Design of Concrete Structures (GB 50010-2010), and there is a risk of exceeding the heavy metal standards. It is necessary to wash 3 times under the condition of solid-to-liquid ratio of 1:3 to reduce the water-soluble chloride content by 87.5%. For baking-free bricks, the impact of raw material composition on the compressive strength is greater than curing methods, and the final strength of common bricks without slag is 2.23 times that of the bricks without sand. The impact of curing methods is reflected in the great increase of compressive strength in the early stage of high temperature curing than natural maintenance, but the final difference is within ±3%. Bricks without sand can reach 10 MPa under high temperature curing, and bricks of slag-to-sand ratio of 1:1 can reach 20 MPa under natural maintenance. Finally, the water-soluble chloride can be reduced by 90%, and the leaching concentration of heavy metals can be reduced by 50% to 60%, which can meet the standard requirements of bricks for different usages. Obviously, selecting appropriate material composition and curing methods under different requirements can consume large amounts of slag and less energy. It can also reduce water-soluble chloride content and heavy metal leaching concentration, which has environmental benefits.