NOVELTY - A dye sensitizing solar cell electrolyte comprises A composition, B composition and C composition at a mass ratio of 2-17:1-2:1-2. The A composition is the oxidation-reduction pair, additive chelated with optimal anode and mixture solution consisting of ionic liquid. The oxidation-reduction pair comprises iodine elementary substance. The B composition is the viscous agent for increasing viscosity of system. The viscous agent is macromolecule polymer or inorganic nanoparticle. The C composition is the viscosity regulator for regulating leveling property of system during screen printing.    USE - An electrolyte for dye sensitizing solar cell.    ADVANTAGE - The electrolyte has small volatility and good stability for long period; and is capable of performing screen printing, and satisfying the requirement for industrialized production.    DETAILED DESCRIPTION - A dye sensitizing solar cell electrolyte comprises A composition, B composition and C composition at a mass ratio of 2-17:1-2:1-2. The A composition is the oxidation-reduction pair, additive chelated with optimal anode and mixture solution consisting of ionic liquid. The oxidation-reduction pair comprises iodine elementary substance. The ionic liquid is the ionic liquid of imidazole salt which is in liquid state at room temperature. The iodine elementary substance to additive mol ratio is 1:0.2-2. The density of iodine elementary substance in A composition of the mixture solution is 0.01-1 mol/L. The B composition is the viscous agent for increasing the viscosity of the system. The viscous agent is the macromolecule polymer or inorganic nanoparticle. The macromolecule polymer is polyethylene glycol, polyoxyethylene or polyethylene pyrrolidone. The C composition is the viscosity regulator for regulating the leveling property of system during screen printing. An INDEPENDENT CLAIM is included for preparing method of electrolyte for dye sensitizing solar cell comprising :    (A) according to mol ratio of iodine elementary substance: iodine negative ion: additive of 1:0-10:0.2-2, adding the iodine elementary substance, iodine negative ion and additive into the ionic liquid, mixing for 10-60 minutes at room temperature, obtaining the A composition until they are completely dissolved;    (B) according to the mass ratio of A composition: B composition of 2-17:1-2, adding the B composition into the A composition, ultrasonically processing for 0.5-2 hours, obtaining the mixture until the system is symmetrical; and    (C) according to the mass ratio of A composition: C composition of 2-17:1-2, adding the C composition into the obtained mixture, mixing for 0.5-3 hours at 50-100 degrees C, and obtaining the needed electrolyte until it is cooled to be room temperature.