A chemical method for preparing dye-sensitized solar cell slurry relates to a method for preparing dye-sensitized solar cell slurry. The method comprises the following steps: (1) dispersing P25 titanium dioxide into water or ethyl alcohol, and adding glacial acetic acid as the surface modifying agent of titanium dioxide; (2) heating the mixed solution obtained from step (1) to 80-90 DEG C and keeping the mixed solution at the temperature for 10-24h; (3) drying the mixture obtained from step (2) in a vacuum drying box to obtain surface-modified powder; and (4) dispersing the powder obtained from step (3) into aqueous solution under ultrasonic waves, and adding ethyl alcohol solution containing 0.05-0.2wt% of hydrochloric acid to prepare thick titanium dioxide slurry. The method of the invention is simple and practical. The P25 powder is low in cost, an electrode prepared with the slurry is transparent, the whole process has a short period, the process is simple, and large-scale industrial production is easy to realize.