The invention discloses a mobile fermentation method for producing a concentrated fertilizer through humic acid. The mobile fermentation method comprises the following steps in sequence: adding a base fermentation substance in a dried material mixer and mixing; puffing the mixed material through a twin-screw extruding and puffing machine; conveying the puffed material to a wet material mixer; adding yellow water to cool to 30-35 DEG C; inoculating a mixed bacteria liquid, and fully mixing; filling the mixture into a ventilating film fermenting bag, then packing and sealing; and fermenting for 5 to 10 days in a fermentation chamber at constant temperature, thus obtaining the concentrated fertilizer, wherein the base fermentation substance is prepared by uniformly mixing 50 to 60 parts by weight of fulvic acid, 10 to 20 parts by weight of vinasse, 10 to 20 parts by weight of powdered maize straw, 5 to 10 by weight parts of urea, 1 to 2 parts by weight of diammonium hydrogen phosphate, and 5 to 10 parts by weight of potassium chloride; in the base fermentation substance, the moisture content is 20 to 30wt%, and 10 to 20 parts of yellow water by weight is added; and the mixed bacteria liquid comprises the bacteria liquid of trichoderma harzianum, wet fiber monospora, bacillus latersprorus, bacillus megatherium, azotobacter chroococcum, bacillus mucilaginosus and lactobacillus plantarum.