A new method of preparing superconducting PdCu alloy is ion-implanting Cu into Pd and subsequent electrolysis at room temperature, then hydrogen implanting at liquid nitrogen temperature. Thus we obtain the superconducting structure H/Pd55Cu45=0.7, which has the highest transition temperature of 17 K. The paper also gives some results of the distribution of hydrogen in the alloy and its effects on superconducting transition temperature, as well as experimental conditions, so that it provides some interesting informations about the investigation of the new method in preparing them.