The invention relates to a soil conditioner for a mineral raw material. The soil conditioner is prepared from the following raw materials in parts by weight: 80-100 parts of livestock wastes, 30-50 parts of limestone, 30-50 parts of peat, 30-50 parts of gypsum, 20-40 parts of dolostone, 20-40 parts of bentonite, 30-50 parts of zeolite, 20-40 parts of straw, 22-40 parts of celestite, 20-40 parts of vermiculite, 20-40 parts of diatomaceous earth, 20-40 parts of saponite, 15-30 parts of weathered coal, 10-20 parts of oil shale, 10-20 parts of a multiple species inoculant, 10-20 parts of feldspar, 10-20 parts of calcite, and 15-30 parts of Shizhong Huangzi. The preparation method comprises performing pretreatment, performing turning, performing stirring, performing temperature control, performing fermentation post-treatment, and preparing finished products. The soil conditioner disclosed by the invention is multifunctional, high in content, high in activity and high in absorption, comprehensive in nutrients, rich in various elements of phosphorus, potassium, calcium, ferrum, copper, manganese, boron, sulphur, molybdenum, selenium and the like, and facilitates absorption of plants.