The invention relates to a soil conditioner, and relates to the technical field of agricultural fertilizer. The soil conditioner is prepared from the raw materials of, by weight, 300 parts of silicon-calcium powder, 100 parts of agricultural rare earth, 100 parts of maifanite powder, 150 parts of 98% amino acid original powder, 30 parts of rosin powder, 3 parts of oligochitosan, 3 parts of a soil loosening agent, 10 parts of bacillus subtilis, 20 parts of a water retention agent, 1-5 parts of a urease inhibitor, 1 part of a tetramethyl glutaric acid chelating agent, 70-90 parts of ferrous sulfate, 40-60 parts of zinc sulfate, 90-110 parts if magnesium sulfate, and 40-60 parts of borax. With the soil conditioner provided by the invention, pesticide dose can be greatly reduced, and pesticide residue pollution can be reduced. While crop yield is increased, the soil is turned healthier. As a result of experiments, the soil conditioner has effective functions of breaking soil compaction, regulating acid-base balance, reducing soil salt damage, retaining water and fertilizer, resisting drought and waterlogging, loosening soil and ventilating, and supplementing medium-trace elements and biological bacteria. The soil conditioner is a green ecological functional fertilizer worth promoting.