Dust settling method

The invention provides a dust settling method. The dust settling method comprises the following specific steps: (1) a fan sucks air to suck dust at a first dust suction port and a second dust suction port into a settling chamber; (2) the dust flows in the settling chamber; (3) the large-particle dust is blocked by a first blocking block and falls into a first-stage settling tank through gravity; (3.1) the large-particle dust falls into the first-stage settling tank through gravity under the flow guide of downward and outward inclined arrangement of the first flow dividing part; (4) small-particle dust flows into the main settling tank and finally falls into a secondary settling tank; and (4.1) the small-particle dust flows into the main settling tank under the upward and outward flow guide action of the second flow dividing part, and finally falls into the secondary settling tank. 本发明提供一种灰尘沉降方法，具体步骤包括：（1）风机抽风将第一吸尘口和第二吸尘口的灰尘吸入至沉降室内；（2）灰尘在沉降室内流动；（3）大颗粒灰尘被第一阻挡块阻挡且通过重力下落至一级沉降槽内；（3.1）大颗粒灰尘在第一分流部向下向外倾斜设置的导流下通过重力下落至