Tailing baking-free brick and preparation method thereof

The invention relates to a tailing baking-free brick and a preparation method thereof. The tailing baking-free brick is characterized by comprising the following components (by mass percent): 40-60 percent of limestone, 15-22 percent of pulverized fuel ash, 20-30 percent of shale, 5-8 percent of cement and 0.003-0.005 percent of liquid soil curing agent. The preparation method of the tailing baking-free brick comprises the following steps of: crushing the limestone to be particle size of 20-60mm, grinding the shale to be less than 0.125-0.044mm, and ensuring the fineness of the pulverized fuel ash to be more than 100 meshes; then, metering and taking raw materials according to the mass percent of the components, and mixing the raw materials by a mixer; exhausting the air in the gaps of aggregate by using an edge runner mill to roll repeatedly; pressing for molding by mechanical pressure through digestion reaction; naturally maintaining; and leading anti-skidding grooves to be arranged on the upper and the low