The invention relates to a method and a device for grinding zirconium silicate by stages. The method comprises the following steps: a, adding water to zirconium silicate till the concentration is 60-70%; adding into a ball mill to grind for 12-15h; b, discharging materials in the ball mill; adding water, stirring and homogenizing so as to enable the concentration of the zirconium silicate to be 60-70%; and c, injecting the homogenized zirconium silicate material to a stirring mill to finely grind for 1-5h. The invention also relates to a device for grinding zirconium silicate by stages, comprising a ball mill (1), a homogenizing tank (4) and a stirring mill (10); and the homogenizing tank (4) is connected with the ball mill (1) by a pipeline (3) and connected to the stirring mill (10) by a pipeline (7), a pump (8) and a valve (9). The invention has the advantages that the efficiencies of different grinding equipment are utilized to process the zirconium silicate to reach the lowest granularity of 0.6-1.0um, thereby greatly decreasing the processing cost and greatly improving the efficiency.