We report a case of a 9-day-old newborn who underwent arterial embolization for Kaposiform hemangioendothelioma (KHE) with Kasabach-Merritt phenomenon (KMP), combined with sirolimus treatment, and the outcome was favorable. To the best of our knowledge, there are no case reports of such small infants undergoing arterial embolization to treat KHE. Our successful experience of treating KHE with KMP showed that transcatheter arterial embolization is feasible and can be used as an alternative to surgical resection, even in small infants.