The invention discloses a rhizoma corydalis-angelica ointment and a preparation method thereof. The preparation method comprises the following steps: weighing angelica, rhizoma corydalis and dried ginger; adding an ethanol water solution into the angelica and dried ginger, extracting under reflux, filtering, recovering the ethanol, cooling by standing, extracting with an organic solvent, recovering the organic solvent from the extract, and concentrating to obtain an extractum 1; adding the rhizoma corydalis into an ethanol water solution, extracting under reflux, filtering, recovering the ethanol, regulating the pH value, extracting with an organic solvent, recovering the organic solvent from the extract, and concentrating to obtain an extractum 2; and drying, pulverizing and mixing the extractum 1 and the extractum 2 to obtain a mixture; and adding distilled water and flavoring agents, and evenly mixing to obtain the rhizoma corydalis-angelica ointment. The rhizoma corydalis-angelica ointment disclosed by the invention has the effects of activating blood circulation to dissipate blood stasis, warming the channel and relieving pain, and is used for primary dysmenorrhea caused by accumulation of pathogenic cold and blood stasis. The rhizoma corydalis-angelica ointment prepared by the method has the advantages of quick effect taking and obvious curative effect, is convenient to take, and treats both the symptoms and root causes, thereby satisfying the demands of broad patients. The preparation method has the advantages of fewer working hours and high transfer rate of effective components.