The invention provides a preparation method of a tungsten-copper alloy material. The preparation method of the tungsten-copper alloy material specifically comprises the steps that firstly, the powdermixture of CuO powder and W powder is reduced twice, and the powder mixture is compacted and compression-molded after each time of reduction and then crushed into powder for next operation; secondly,the obtained powder mixture is prepared into a green blank, copper sheets are placed above and below the green blank, and sintering and primary copper infiltration are conducted; and finally, the processed material is placed in a graphite container, a woven tungsten filament body is placed on the material, and fusing copper infiltration is conducted under the vacuum condition, so that a copper-tungsten contact material is obtained. According to the preparation method of the tungsten-copper alloy material, inductive Cu powder is replaced by CuO powder, and the woven tungsten filament body is used as a formwork, so that the electric arc erosion resistance of the contact material is improved, and meanwhile, the strength of the material is also improved.