The invention discloses a technology for purifying medicines for treating
deep fungal infection. The technology is characterized in that the technology comprises the following steps: 1, adding one-hundred-million
amphotericin B to a mixed
solvent of
dimethyl formamide and a 180%
methanol solution, and adjusting the pH value of the resulting solution; 2, preprocessing a macroporous absorbent resin A and a macroporous absorbent resin B which have different polarities with the
dimethyl formamide and
ethanol, mixing the resin A with the resin B according to a resin A / resin B ratio of 3:4-5:6, packing the resulting mixed resin to a
chromatographic column having a column length-
diameter ratio of 12.5:1 through using a wet
packing method to obtain a mixed resin column, allowing a filtrate obtained in step 1 to pass through the mixed resin column, mixing the filtrate passing through the mixed resin column with
dichloromethane and injection water according to a ratio of the
amphotericin B to the
dichloromethane to the injection water of one hundred million:10-20ml:10-25ml, adjusting the pH of the resulting solution with an acid or an alkali to 4.0-6.0, crystallizing, maintaining the temperature at 35-45DEG C after
crystal generation, and carrying out
crystal growing through allowing crystals to stand for 18-24h; and 3, carrying out suction
filtration on the solution obtained after the
crystal growing, and
drying at 40-60DEG C for 24-30h to obtain products. The technology solves problems of low yield, complex technology and high cost of traditional recrystallization methods, and solves disadvantages of use of a single resin to purify, long column passing time, large resin consumption amount, and unsatisfactory effect.