Soil conditioner and preparation method and application thereof

The invention is applicable to the technical field of soil improvement, and provides a soil conditioner and a preparation method and application thereof. The soil conditioner is prepared from the following components: seaweed, medical stone, composite biological bacteria, a chelating agent and brown sugar, wherein the composite biological bacteria comprise at least two of EM bacteria, ferment bacteria and bacillus. The invention provides a soil conditioner. Seaweed and medical stone are used as raw materials, and composite biological bacteria, chelating agents, brown sugar and other additivesare added, so that the effects of changing the soil aggregate structure, activating mineral elements, removing pesticide residues, activating soil, shielding heavy metal, balancing the pH value of thesoil and the like can be achieved, and therefore the yield of rice and other crops can be increased, and the content of the heavy metal in the crops can be reduced; in addition, by adding the composite biological bacteria, th