The invention discloses a ferrite material used for intermediate-frequency transformer magnetic cores, and a preparation method of the ferrite material. The ferrite material comprises iron oxide, zinc oxide and manganese oxide as main components, and also comprises auxiliary materials; and the auxiliary materials comprise silicon oxide, ferrous chloride, calcium oxide, ethyl orthosilicate, zinc dihydrogen phosphate, cobalt oxide, lanthana, gadolinium oxide, cuprous bromide, zirconia, polyvinyl alcohol, boron oxide, triallyl isocyanurate, kaolin, ammonium sulfate, alumina, caprolactam, potassium, strontium, nickel, titanium dioxide, iron chloride, copper and samarium. Silicon oxide, ferrous chloride, calcium oxide, ethyl orthosilicate and other raw materials are added in the prior art as auxiliary materials to improve the dispersibility and the compressibility of ferrite particles in order to greatly enhance arrangement degree of the ferrite particles along the easy magnetization direction , so the orientation degree of the ferrite particles and the density of formed ferrite are greatly improved, the raw material cost is low, and the ferrite material is suitable for being widely promoted and used.