The invention relates to a harmless and comprehensive utilization method for vanadium-extraction liquid leached residue (in particular, low-sodium roasted vanadium-extraction liquid leached residue). The method is characterized by comprising the following steps of: taking the vanadium-extraction liquid leached residue as a raw material, extracting the valuable elements, such as vanadium, aluminum, ferrum, phosphorus and the like by carrying out a series of treatments, such as acid leaching, ion exchange, stripping liquid purification, ammonium polyvanadate precipitation, ammonium polyvanadate pyrolysis, and aluminum-ferrum-phosphorus precipitation for a solution obtained after carrying out ion exchange, wherein the liquid leached residue can be harmless and can have chemical stability; and then, mixing the chemical stability with a limestone crushed material and cement, grinding, moistening by using water, then, briquetting, stripping and carrying out natural curing to form a baking-free brick which meets the requirements of the GB6566-2001 on decorative materials.