The invention relates to a method for preparing composite porcelain imitation wood prepared by bauxite tailings, which is characterized in that in the preparation process, calcination and grinding activation are carried out on the bauxite tailings, and then the bauxite tailings is mixed with blast furnace slag, pulverized fuel ash and cement, so that low temperature gelatinized powder can be prepared; after that, the gelatinized powder is mixed with waste plastics and added with chemical activator, and the mixture is added with water to be evenly stirred for forming by pressing; finally, after being moisturized with a mould, maintained and demoulded, the composite porcelain imitation wood product can be obtained after steam curing. The obtained product has excellent performance and simpleproduction technique, utilizes a great deal of solid wastes such as tailings, waste plastics and the like, and reduces the harm of the solid wastes for the environment.