White masterbatch for injection molding is made of high quality imported titanium dioxide as the main raw material, mixed with carrier resin and dispersing agent, lubricant and other additives, and fully mixed by high-performance twin-screw extruder, extrusion granulation, with good dispersion in matrix resin, high whiteness, good processing performance and other advantages. This white mother titanium dioxide content is about 15%-45%, with fast, anti-aging characteristics, suitable for pumping, injection molding and other production processes