The invention discloses a dye-sensitized solar cell slurry preparation method and relates to the technical field of electrochemistry. The preparation method comprises the following steps: a step of preparing molybdenum dioxide nanometer particles, a step of preparing slurry, a step of solidifying the slurry and a step of obtaining needed dye-sensitized solar cell slurry via evaporation operation; the slurry obtained via the method is uniform in particle dispersion, added graphene is great in specific surface area and electronic conductivity, rate capability of a cell can be greatly improved, molybdenum dioxide is characterized by transparency and high electricity conductivity and plays an important role in improving conversion efficiency of a solar cell, and the solar cell slurry prepared via the method can be used for slurry viscosity adjustment.