The invention discloses a gel electrolyte in a dye-sensitized solar cell, a special electrolyte and a preparation method thereof. The electrolyte comprises the components of elementary iodine, lithium iodide, N-methyl benzimidazole, 1,2-dimethyl-3-propyl imidazolium iodide and solvent. The method comprises the steps of adding gelata into the liquid electrolyte, uniformly mixing, and obtaining thegel electrolyte in the dye-sensitized solar cell; the used liquid electrolyte comprises the following components: the iodide, the N-methyl benzimidazole and the 1,2-dimethyl-3-propyl imidazolium, andthe solvent is 3-methoxy propionitrile; and the gelata is polyethylene oxide. The molecular weight of the polyethylene oxide in the method is 0.3-4.0 multiplied by 106g/mol. The using amount of the gelata is 2.5%-30.0% of the total weight of the liquid electrolyte. The gel electrolyte provided by the invention can not only lead the cell to have great photoelectric conversion efficiency, but also ensure the stability of the cell, thereby having good application prospects.