The invention provides a production method of special titanium dioxide for decorative base paper, belonging to the technical field of titanium dioxide. The production method comprises the following steps of A, preparing titanium dioxide into 500-600g/L TiO2 sizing agent by using desalted water, adding silicate, grinding, regulating pH of the sizing agent to be 9.5-10, heating up to 40-80 DEG C, then diluting to obtain 300+/-10g/L TiO2 sizing agent, and keeping temperature at 40-80 DEG C; B, quickly adding an acid aluminum salt solution into the TiO2 sizing agent diluted in step A, and stirring to obtain mixed sizing agent; C, slowly adding a phosphorus-containing compound solution into the mixed sizing agent of step B, then regulating pH to be 5.0-5.5, and curing; D, after curing, slowly adding an alkali aluminum salt solution under the condition of pH being 5.0-5.5, adding a pH regulator while adding the alkali aluminum salt solution, keeping pH at 5.0-5.5, stirring for 20-40 min, and then regulating pH to be 7.0-8.0; E, curing again, filtering and washing, drying, and crushing to obtain the special titanium dioxide for decorative base paper. The production method is simple and highly practical, and can produce titanium dioxide of stable quality.