The invention discloses method for manufacturing a three-dimensional titanium dioxide photocatalytic material from an additive and belongs to the field of environment function material preparation andapplication. The method for manufacturing the three-dimensional titanium dioxide photocatalytic material from the additive comprises the following steps: selecting TiO2 granules of a certain granulesize and a resin material, preparing TiO2 composite photocatalytic resin powder by using a method of solvent precipitation or mechanical mixing, and carrying out laser area selection sintering so as to form and prepare a ceramic blank; or preparing TiO2 composite photocatalytic resin slurry by using a mechanical mixing method, and preparing the ceramic blank by using a photocuring technique; and carrying out glue removal and calcining on the prepared ceramic blank, thereby obtaining a three-dimensional TiO2 phootcatalytic material. The three-dimensional TiO2 phootcatalytic material is preparedby using an additive manufacturing technique, three-dimensional TiO2 phootcatalytic materials of complex structures can be designed and manufactured according to practical use requirements of materials, and the prepared three-dimensional TiO2 phootcatalytic material has the advantages of being large in specific surface area and high in photocatalysis efficiency.