The invention discloses a method for preparing a steroid 11 beta-hydroxyl compound by reducing a steroid 11-ketone group compound. The method comprises that the steroid 11-ketone group compound and a reduction agent are subjected to a reaction in a non-ester solvent to obtain the steroid 11 beta-hydroxyl compound; the reduction agent is selected from one or more of sodium borohydride, potassium borohydride and lithium borohydride; a metal salt is also added in the reaction system and is selected from one or more of a divalent calcium salt, a divalent magnesium salt, a divalent zinc salt, a divalent copper salt, a divalent cobalt salt, a divalent chromium salt, a tetravalent titanium salt and a trivalent cerium salt; the non-ester solvent is a protic solvent or a mixed solvent of other non-ester organic solvents and the protic solvent. The method has the greatest advantages that the high-purity 11 beta-hydroxyl compound is obtained with high yield at room temperature, and the method is simple in operation, good in repeatability, and easy to industrialize.