The invention relates to a preparation method of silk-screen printing carbon paste and a high-current-conductivity carbon electrode. The preparation method comprises the steps of (1) preparation of the carbon paste, wherein electric conducting carbon materials, including graphite flakes, carbon black and carbon fibers, are mixed proportionally, then ethyl cellulose and zirconia are added as binders, the mixture is placed in an oven for drying, terpineol is added as a solvent after the mixture is cooled to room temperature, and the carbon paste is obtained after full stirring and uniform mixing; and (2) preparation of the carbon electrode, wherein after the carbon paste obtained in the silk-screen printing step (1) is subject to high-temperature sintering, the high-current-conductivity carbon electrode is formed. The preparation method has the advantages that by adding the carbon fibers into the carbon paste, the electric conductivity and current conductivity of the carbon electrode areimproved, more perovskite precursor solutions are guided to be uniformly filled into layers of a mesoporous support, an independent perovskite thin film layer is formed between a carbon electrode layer and a zirconia mesoporous layer, and then a battery structure is formed; and the preparation method is low in cost and simple in preparation technology.