The invention discloses a manufacturing method of dry rice powder. The method comprises the steps as follows: rice selection, soaking, milk grinding, filter pressing, smashing, accessory adding, rice dough kneading, pressing, threading, aging, loosing and dying processes. Compared with the prior art, the method is characterized by further comprising the milk grinding, stock screening, dewatering, filter pressing and smashing steps. According to the method, after dewatering, an accessory is added, so that compared with conventional dry rice powder, the manufactured dry rice powder is white and bright in surface, flexible in texture, not prone to be burnt by poaching and uneasy to break by dry cooking; and compared with fresh wet rice powder, the dry rice powder is smooth in texture, fragrant, flavorful and good in taste.