Cermet has the characteristics of metal and ceramics, and the advantages of high strength and good toughness. It is one of the research hotspots in the field of materials. In this paper, FeCoCrNiAl high-entropy alloy powder and Al2O3 ceramic powder are used as raw materials, and non-toxic water-soluble epoxy resin is used as a binder. An orthogonal test scheme is designed using gel injection molding process to prepare FeCoCrNiAl/ Al2O3 cermet. The effects of epoxy resin addition, powder solid content, dispersant addition and powder composition on the shrinkage, density and flexural strength of FeCoCrNiAl/Al2O3 cermet body are discussed. The results show that the order of the effects of various factors on the overall performance of the body are powder solid content＞ dispersant＞ powder component＞ epoxy resin addition. Among them, the powder solid content has the greatest effect on the performance of the body, and with its increase, the shrinkage rate of the green body gradually decreases, the bending strength gradually increases, and the density first increases and then decreases. The FeCoCrNiAl/Al2O3 cermet prepared by the gel injection molding method has a uniform composition, and the fracture exhibits typical brittle fracture characteristics.