The present invention pertains to the field of pharmaceutical chemicals, and relates to a substituted acethydrazide derivative, preparation method and use thereof preferably, relates to a compound of Formula I or a pharmaceutically acceptable salt thereof. The compound of the present invention or a pharmaceutically acceptable salt thereof can effectively inhibit proline hydroxylase, stabilize HIF-±, particularly HIF-1±, and has potency in the manufacture of a medicament for treatment and/or prophylaxis and/or adjuvant therapy of anemia, acute ischemic reperfusion injury.