Alumina feed as well as preparation method and application thereof

The invention belongs to the technical field of powder metallurgy, and provides an aluminum oxide feed and a preparation method and application thereof.The raw materials for preparing the aluminum oxide feed comprise aluminum oxide ceramic powder and a binding agent, the binding agent comprises a solid modifier, a framework agent and a shape keeping agent, the aluminum oxide ceramic powder and the solid modifier are mixed for first-time mixing, and the solid modifier and the framework agent are mixed for second-time mixing; the preparation method comprises the following steps: adding a matrix agent to carry out secondary mixing, adding a shape retention agent to carry out tertiary mixing, and carrying out three-time mixing modification, so that the powder loading capacity of the prepared alumina feed is 70-85%, the density is 3.92-3.95 g/cm < 3 >, the melt flow rate is 500-1400 g/10 min, and the shrinkage rate is 1.198-1.208%; the aluminum oxide feed is further used in a ceramic powder injection molding proce