The invention discloses a breath-promoting phlegm-dissipating grains ointment preparation method which includes that: in decoction step: negundo chastetree fruit, pinecone, plantain and liquorices are placed in an extraction jaw and decocted twice in water, preferably the water level is beyond the medicine surface, the medicine is filter after each decoction, the filtrate of two times of filtering is placed in a sediment tank for standing precipitation and the standing time is 0.5-1 hour; in the centrifugation step: the filtrate after standing is sucked to a centrifugal machine with a centrifugal filter cloth for centrifugal separation, the centrifugate is collected and the sediment in the filter cloth is removed; in the final condensation step: the centrifugate is condensed to form ointment until the relative density reaches1.28-1.32 at the temperature of 70-80 DEG C, so as to prepare the breath-promoting phlegm-dissipating grains ointment. The invention can reduce the production cycle, improves the productivity, obtains clearer supernate by centrifugal separation comparing with standing precipitation and controls the dissolubility of ointment more easily.