94088-91-2

The invention relates to a preparation process of triamcinolone acetonide. The triamcinolone acetonide is prepared by taking an intermediate III as a raw material. The preparation process comprises the following steps of: by taking a hydrofluoric acid-acetone mixed solvent as a solvent, slowly adding the intermediate III in a temperature range of 40 DEG C below zero to 30 DEG C below zero; after adding the raw material, performing a reaction for 4-8 hours; returning the temperature to 5 DEG C below zero to zero DEG C, and continuously performing a reaction for 10-30 min; after reaction, slowly adding the reaction liquid into a potassium carbonate solution; adjusting the PH value to 7.0-7.5; filtering and discharging the material; and drying the same to obtain triamcinolone acetonide. The preparation process shortens the production period, prevents use of a lot of high-matching acetone and is more environmentally friendly.