The invention relates to a method used for preparing ceramic ganged brick, in particular to the method which uses the dirt in the lake for preparing environment-friendly ceramic ganged bricks. The method is characterized by comprising the following steps: 1) preparation of ceramic body: the dirt is dehydrated to become mud cakes, and is dried until the water content is less than 5wt%,and then is ground until the grain diameter is 1mm or below to get granular lake dirt; the solutizer and grog are smashed to be 1- 1.5mm; the proportions of weight are: 70-80% of granular lake dirt, 5-10% of pulverized fuel ash, 5-10% of solutizer and 10% of grog; granular lake dirt, pulverized fuel ash, solutizer, and grog are chosen, added with water to be blended and stirred, pug with a vacuum pug mill, and then cut to be mud cakes, finally, the body is obtained after storing for 24 hours; 2) the preparation of glazeslip; 3) plastic compression and molding; 4) drying; 5) glazing; 6) baking, the environment-friendly ceramic ganged bricks are obtained. The ceramic ganged brick prepared by the invention is characterized by high flatteness, high intensity, and being directly used for masonry panel without exterior ornament.