NOVELTY - Method for cultivating soil-borne potato using renewable harmless waste substrate involves adding Bacillus subtilis, and B.megaterium to fermentation tank, performing culturing process, adding single spore bacteria to culture solution and performing culturing process, mixing the e.g. B.subtilis fermentation liquor, and wood, drying the mixture, adding the livestock manure and potato cultivation waste substrate, adding the fermentation agent to mixed material, performing fermentation, and adding e.g. organic fertilizer and cultivation process.    USE - The method is useful for cultivating soil-borne potato using renewable harmless waste substrate (claimed).    ADVANTAGE - The method enables to cultivate product environmentally-friendly, and cost-effectively, which reduces production cost of more than 50% and has recovery rate of waste substrate of 99%.    DETAILED DESCRIPTION - Method for cultivating soil-borne potato using renewable harmless waste substrate involves adding 10% Bacillus subtilis, and B.megaterium to different fermentation tank containing culture solution (A), performing culturing process at 30-35 degrees C for 48-56 hours to obtain B.subtilis fermentation liquor and B.megaterium fermentation liquid, adding 15% single spore bacteria to culture solution (B) and performing culturing process at 30-35 degrees C for 30-36 hours to obtain small single bacteria fermentation liquid, mixing the B.subtilis fermentation liquor, B.megaterium fermentation liquid, small single bacteria fermentation liquid, and wood in a volume ratio of 1:1:0.5:5, drying the mixture until the water content is 20% to obtain fermentation agent, adding the livestock manure and potato initial cultivation waste substrate in a volume ratio of 1:1 to obtain mixed material, adding the fermentation agent and mixed material, adding 60-65% distilled water to the mixture, performing fermentation for 20 days, adding organic fertilizer, turfy soil and perlite to the mixture and performing cultivation process, where the culture solution A comprises 10 g sucrose, 10 g starch, 1-2 g yeast extract, 15 g bean cake, 10 g bran, 0.2-0.4 g dipotassium hydrogen phosphate, 0.2-0.4 g magnesium sulfate, 2-5 g calcium carbonate and 1000 ml water, the pH of the culture solution A is 7-7.2, the culture solution B comprises 10 g soluble starch, 10 g sucrose, 2 g ammonium sulfate, 0.8-1 g dipotassium hydrogen phosphate, 0.2-0.4 g manganese sulfate, 1-2 g sodium chloride, 2-5 g calcium carbonate and 1000 ml distilled water, the pH of the medium is 7.2-7.4.