Disclosed is an ointment using the salts or esters of clindamycinum and metronidazole as the active constituents, the constituents of the ointment include (by weight percent): clindamycinum or its medicinal salts or its esters 0.25-5%, metronidazole 0.2-4%, oleaginous base 10-40%, water soluble base 5-50%, and balancing water, wherein the oleaginous base is selected from stearinic acid, glyceryl monostearate, paraffin wax, fluid wax, Vaseline, lanoline, cetyl alcohol, stearyl alcohol, Span series, bee wax, animal or vegetable fat, the water soluble base is selected from glycerin, propylene glycol, sorbitol, polyethylene glycol series, Tween series, sodium dodecylsulfate, dimethyl sulfoxide, triethanolamine, and ethanol.