The invention provides a method for preparing a silver-nickel alloy material. The method comprises the following steps: preparing a mixed aqueous solution of AgNO3, Ni(NO3)2, Sm(NO3) and Sc(NO3)3; preparing an excessive amount of a tetramethylammonium hydroxide solution; under the stirring condition, dropwise adding the mixed aqueous solution into the tetramethylammonium hydroxide solution, and waiting for the generation of a precipitate till the reaction is finished; carrying out vacuum filtration on the precipitate, cleaning the filtered precipitate by using deionized water, decomposing the cleaned precipitate in a hydrogen atmosphere of 300 DEG C, and carrying out reduction to obtain dispersed nanoscale Ag, Ni, Sm and (Sc) powder; and subjecting the powder to compaction at 300 MPa, primary compaction and primary sintering in the hydrogen atmosphere of 700 DEG C, compact at 500 MPa, and secondary compaction and secondary sintering in the hydrogen atmosphere of 700 DEG C, heating to 600 DEG C, and carrying out extrusion to obtain a AgNiSm(Sc) alloy material, namely the silver-nickel alloy material. For the prepared silver-nickel alloy material, no impurity metal elements such as Na are introduced into the preparation process; the preparation process is simple, the cycle is short and the cost is low; and the method is applicable to industrialized production.