The invention relates to a high-strength, high-electrical-conductivity and high-heat-conductivity copper-silver series alloy wire material and a preparation method thereof and belongs to the technicalfield of metal material preparation. The preparation method for the high-strength, high-electrical-conductivity and high-heat-conductivity copper-silver series alloy wire material comprises the following steps of (1), batching and smelting; (2), hot type horizontal continuous casting, specifically, a melt adopts the hot type horizontal continuous casting to obtain a blank material, a crystallizerof the hot type horizontal continuous casting is a hot type crystallizer, the temperature of the melt inside the hot type crystallizer is maintained above the melting point of the copper-silver series alloy wire material, and a cooling method of the hot type horizontal continuous casting is twice cooling and is water cooling; and (3), combined thermomechanical treatment, specifically, solid solution treatment, drawing plastic deformation treatment and aging heat treatment are performed on the blank material in sequence, and the high-strength, high-electrical-conductivity and high-heat-conductivity copper-silver series alloy wire material is obtained. By means of the preparation method for the high-strength, high-electrical-conductivity and high-heat-conductivity copper-silver series alloywire material, improvement of casting-state structures is facilitated, the electrical conductivity, the heat conductivity and the tensile strength of copper-silver alloy are improved, and continuousproduction can be realized.