Titanium dioxide is an important inorganic chemical pigment, especially in coatings, printing ink, paper, plastic and rubber, chemical fiber, ceramics and other industries have important applications. According to crystalline morphology, it can be divided into Anatase type and Rutile type. Anatase type titanium dioxide whiteness is good, but the tinting power is only 70% of the rutile type. In terms of weatherability: adding anatase type titanium dioxide test piece began to crack or flake off after only one year, and adding rutile type titanium dioxide test piece, after ten years, its appearance has only a small change. Because of the good coloration and weatherability of rutile TiO2, it is better to use rutile TiO2 for plastic coloration.