A production process of the non-phosgene synthesis of scarlet acid particularly comprises the following steps: firstly dissolving J acid into water, adjusting the pH of the solution medium with 30% liquid alkali to obtain a pH of about 7, after complete dissolution, adding bis(trichloromethyl)carbonate with a theoretical amount being 16.7% of the feeding amount of the J acid, performing phosgenation reaction under a controlled temperature of 35-65 DEG C, wherein a reaction end point is reached when no NaOH is consumed and the content of the J acid in materials is not more than 5 g/L. In the process, the amount of bis(trichloromethyl)carbonate approaches the theoretical amount, so the amount of the liquid alkali is reduced by two-thirds; the inorganic salt content in the product is greatly decreased; the product quality is improved; the reaction condition is safe and moderate; the danger of the phosgene toxicity is eliminated essentially; and the process is applicable to industrial production.