The present invention relates to a method for preparing red ginseng extract powder having excellent physical properties and economical efficiency. The method for preparing red ginseng extract powder according to the present invention comprises the steps of: 1) preparing a water concentrate powder by drying and concentrating a water concentrate obtained by extracting red ginseng with water; 2) preparing a concentrated alcohol concentrate by extracting the remaining solid after extraction in step 1) with alcohol; And 3) coating the alcohol concentrate of step 2) with the water concentrate powder of step 1) and pulverizing the alcohol concentrate. The ginsenoside Rg1 + Rb1 + Rg3 is enhanced and the moisture resistance And therefore, the production method of the present invention can be usefully used in the functional food market including red ginseng powder.
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