The invention relates to a preparation for reducing soil-borne disease, promoting rooting and resisting continuous cropping. The preparation is prepared by mixing the following raw materials in parts by weight: 35-50 parts of fulvic acid, 10-15 parts of ferrous sulfate, 10-15 parts of magnesium sulfate, 5-8 parts of sodium octaborate, 7-10 parts of zinc sulfate, 20-30 parts of bacillus subtilis, 15-25 parts of bacillus cereus, 20-30 parts of trichoderma viride, 2-5 parts of complex amino acid and 0.1-0.5 part of indolebutyric acid. By using the preparation, a plurality of medium trace elements necessary to the growth of crops can be provided; by replenishing a certain quantity of beneficial bacteria into soil, the growth and reproduction of harmful bacteria are suppressed; protective barriers are formed on root systems, so that soil-borne disease is reduced to the maximum extent; beneficial microorganisms continuously secrete active substances such as auximone and amino acids, so that rooting is promoted greatly; various nutrients in soil can be activated and supplied to crops for absorbing and utilizing; moreover, by using the preparation together with an organic fertilizer, the granular structure of soil is changed, and soil hardening is eliminated. By adopting the preparation, the soil becomes loose, the number of roots is increased, bacteria are reduced, and continuous cropping can be resisted effectively.