NOVELTY - A liquid water-soluble carbon fertilizer is produced by inputting concentrated nitric acid and hydrogen peroxide into bottom part of stirring pot containing high-concentration organic wastewater, and stirring for 45-60 minutes to fast crack the organic large molecular groups in the wastewater into small molecular groups by high oxidization; leading foam generated by the liquid material in the stirring pot during the stirring process into a defoaming pool to defoam naturally into clear solution; and naturally cooling the hot clear solution in the radiating solution storage pool.    USE - Method for producing liquid water-soluble carbon fertilizer (claimed) used for crop irrigation, spraying, or with other inorganic nutrient solution into pipeline and drip irrigation.    ADVANTAGE - The method is capable of providing fertilizer which is totally dissolved in water, has high diffusion and permeation capacity, and has carbon content of 131-171 g/L.    DETAILED DESCRIPTION - Producing liquid water-soluble carbon fertilizer by high-concentration organic wastewater comprises:    (A) inputting concentrated nitric acid and hydrogen peroxide into bottom part of stirring pot containing high-concentration organic wastewater with water content of 50-60% and organic material content of 20-25%, starting a stirring paddle in the stirring pot, and stirring for 45-60 minutes to fast crack the organic large molecular groups in the wastewater into small molecular groups by high oxidization;    (B) leading foam generated by the liquid material in the stirring pot during the stirring process into a defoaming pool to defoam naturally into clear solution, and draining the clear solution into a radiating solution storage pool, in which most liquid material in the stirring pot is formed into hot clear solution with stable volume after the stirring process and after the air bubbles disappear; and    (C) naturally cooling the hot clear solution in the radiating solution storage pool to obtain the liquid water-soluble carbon fertilizer.