The invention relates to the technical field of white carbon black processes, in particular to an environment-friendly white carbon black preparation method. The method comprises the following steps that 1, solid sodium silicate is added into a dissolution device, water is added, the dissolution device is sealed, steam is introduced until the steam pressure in the dissolution device reaches 120-150-cm mercury column, after all the sodium silicate is dissolved, a dilute sodium silicate solution with the specific gravity of 1.36-1.38 g/cm<3> is formed, and the dilute sodium silicate solution isplaced in a reaction kettle. Therefore, in the environment-friendly white carbon black preparation method, the solid sodium silicate is added into the dissolution device, the water is added, the dissolution device is sealed, the steam is introduced until the steam pressure in the dissolution device reaches 120-150-cm mercury column, the introduced steam can accelerate dissolution of the solid sodium silicate, moreover, when the pressure value of the introduced steam is 120-150 cm, heating of the solid sodium silicate can be accelerated, the molecular activity is improved, and the dissolution cycle is shortened.