The invention discloses a method for preparing a high-solid-solubility Cu-Sn-Ti alloy through assistance of electric pulses. The method comprises the following steps that 1, copper powder, tin powderand titanium powder are mixed and pressed for vacuum high-temperature sintering, and the Cu-Sn-Ti alloy is obtained; 2, the Cu-Sn-Ti alloy obtained in the step 1 is cold-rolled; 3, electric pulse treatment is conducted on the Cu-Sn-Ti alloy rolled in the step 2; and 4, the process from the step 2 to the step 3 is conducted two to three times repeatedly, and finally the high-solid-solubility Cu-Sn-Ti alloy is obtained. The preparation method has the following advantages that by conducting cold-rolling and electric pulse treatment repeatedly on the Cu-Sn-Ti alloy, a uniform tiny alloy structureis obtained; meanwhile, due to the electroplastic effect of the electric pulses, the plasticity of the alloy is also improved; and the method is easy to implement, and the refining effect of the alloystructure is remarkable.