The invention discloses moxibustion powder for pregnancy promotion by warming the womb and a preparation method of the moxibustion powder, and particularly relates to the technical field of medicine.The moxibustion powder comprises 25-35g of dried ginger, 25-35g of rhizoma corydalis, 25-35g of cloves, 25-35g of cumin, 25-35g of cinnamon and 8-12g of borneol. The moxibustion powder and the preparation method thereof have the advantages that the traditional Chinese medicine ingredients are reasonably matched, the dried ginger has the effects of warming the spleen and stomach, dispelling cold, tonifying yang and dredging collaterals, the rhizoma corydalis has the effects of prompting blood circulation, removing blood stasis, regulating qi and relieving pain, the cloves have the effects of warming the spleen and stomach, calming adverse-rising energy, eliminating the cold, relieving pain and warming the stomach, the cumin has the effects of warming the kidney, eliminating the cold, tonifying the stomach and regulating the qi, the cinnamon has the effects of tonifying kidney-yang, warming the spleen and stomach, removing accumulated cold and promoting blood circulation, and the borneolwith an acrid flavor has the effects of relieving stuffiness, clearing stagnated fire, improving eyesight and relieving swelling and pain; through combination of the herbs, the whole formula has theeffects of warning the kidney, promoting yang, eliminating the cold, relieving the pain, promoting the qi, activating blood and promoting pregnancy; through moxibustion, heat and drugs pass through the skin to be transferred into meridian points, so that the moxibustion powder is beneficial to treatment of female sterility and repeated embryo growth arrest both caused by yang-deficiency, cold accumulation, qi stagnation, blood stasis and the like, as well as to traditional Chinese medicinal conditioning before egg collection and transplantation for in-vitro fertilization.