Oil smoke purifying and filtering method

The invention discloses an oil fume purifying and filtering method, which comprises the following steps that: an ascending oil fume channel in a shell starts to circulate oil fume, so that the oil fume sequentially passes through a primary filter layer group and a secondary filter; adjusting the primary filter layer group to be in a horizontal state and lasting for time T1, so that the resistance of the lampblack passing through the primary filter layer group is minimized; adjusting the primary filtering layer group to be inclined to the horizontal direction by an angle theta 1 for duration of T2, so that accumulated oil on the primary filtering layer group flows and is discharged out of the rising oil smoke channel; and the step 2 and the step 3 are executed circularly until the oil smoke in the rising oil smoke channel stops flowing. The cleaning device has the beneficial effect that cleaning difficulty and potential safety hazards caused by downward dripping of oil drops are avoided. 本发明公开了一种油烟净化过滤方法，步骤包括：