The invention discloses a titanium oxide sol coating method for an archaized brick. The method mainly comprises the following steps: A, carrying out degreasing on the surface of a common archaized brick; B, uniformly coating a layer of titanium oxide sol at the speed of 10-50cm/s on the surface of the archaized brick by using a windscreen wiper coated with a non-dust cloth or lint, wherein the angle formed by the windscreen wiper and the surface of the archaized brick is 20-80 degrees, or uniformly coating the titanium oxide sol layer on the surface of the archaized brick at the speed of 20-100cm/s by using an air compressor or an airless sprayer matched with a spray gun of a nozzle of which the caliber is 0.3-1.0mm, wherein the distance from the nozzle of the spray gun to the archaized brick is 10-50cm; or coating the titanium oxide sol layer on the surface of the archaized brick by adopting a JFA-II automatic coating machine; C, burning at certain temperature for a period of time, and then preparing the archaized brick with the titanium oxide coating.