The invention belongs to the field of titanium dioxide application performance and provides a method for detecting oil-dispersing property of titanium dioxide which is used in the field of the oil paint industry. The method comprises the steps that a. a pre-dispersion solution is prepared, wherein the pre-dispersion solution comprises short oil alkyd resin, xylene and flatting agents, and the three substances are weighed into a dispersing tank according to a certain weight ratio; b. feeding is carried out, wherein a dispersing machine is used for carrying out even stirring on the pre-dispersion solution, and when the pre-dispersion solution is subjected to even stirring, titanium dioxide is evenly added; c. dispersing beating is carried out, wherein after titanium dioxide feeding is over, stirring is carried out continuously, and finally a sample to be detected is obtained; and d. detecting is carried out, wherein the sample to be detected is subjected to scarper plate detecting on a scraper plate fineness gauge of 0-100 microns. Detecting simplification, controllability, standardization and unification can be achieved, lateral comparability in the industry is achieved, and the method can be used as a universal standard for detecting titanium dioxide oil-dispersing property executed commonly in the titanium dioxide industry, the paint industry and the printing ink industry.