The utility model relates to a light dust dust collector based on whirl flow field. Its characteristics are: including dust collecting chamber (4), through dust collecting pipeline (3) and collection dirt bucket (1) intercommunication, wherein dust collecting chamber (4) are hollow cylindrical housing in the middle of this dust collecting chamber (4) bottom, are equipped with intake pipe three at least and dust collecting chamber (4) inside intercommunication along the circumferencial direction on the lateral wall of this dust collecting chamber (4) to every intake pipe is the acute angle with the lateral wall contained angle of dust collecting chamber (4). The beneficial effect of the utility model as follows: 1 ) the utility model discloses the device forms high -speed whirl flow field in carrying out circular dust collecting chamber with dusty airflow with certain velocity of flow and dynamic pressure under the effect of air inlet air current, zero district of central speed that utilizes the whirl flow field to form realizes the dust removal of antipodal light and minimum particle diameter dust. 2 ) the utility model discloses the device adopts second grade dust removal structure, and the dust collecting chamber removes dust for the one -level, and funnel mechanism removes dust for the second grade, improves dust removal effect.