A dust collection device , comprising: a housing including a first housing portion and a second housing portion detachably connected to the first housing portion , defining an accommodating chamber for collecting a dust and formed by joining the second housing portion with the first housing portion ; an air inlet pipe , configured to guide an airflow to enter the dust collection device along a first straight line ; a cyclone pipe , extending along a second straight line , and comprising a first end for air intake and a second end for dust discharge along the second straight line ; an air duct pipe , defining an air duct communicating the air inlet pipe with the cyclone pipe ; and a ventilation pipe , arranged at the first end of the cyclone pipe and communicated with the cyclone pipe , the ventilation pipe being configured to guide the airflow after being subjected to dust separation performed by the cyclone pipe out of the housing ; wherein the housing defines an air outlet communicated with the ventilation pipe or through which the ventilation pipe extends out of the housing ; the second straight line along which the cyclone pipe extends intersect the first straight line to form an angle greater than or equal to 25° and less than or equal to 90°, the air duct pipe includes a third end for connecting the air inlet pipe and a fourth end for connecting the cyclone pipe , wherein the third end and the fourth end are located at two ends of the air duct pipe in a direction along which the air duct pipe extends; and characterized in that the air duct pipe further includes an oblique portion which at least partially extends along a fourth straight line obliquely intersecting the second straight line and obliquely intersecting the first straight line , wherein a height difference (H) is present between the fourth end and the third end in the second straight line 102. a housing including a first housing portion and a second housing portion detachably connected to the first housing portion , defining an accommodating chamber for collecting a dust and formed by joining the second housing portion with the first housing portion ; an air inlet pipe , configured to guide an airflow to enter the dust collection device along a first straight line ; a cyclone pipe , extending along a second straight line , and comprising a first end for air intake and a second end for dust discharge along the second straight line ; an air duct pipe , defining an air duct communicating the air inlet pipe with the cyclone pipe ; and a ventilation pipe , arranged at the first end of the cyclone pipe and communicated with the cyclone pipe , the ventilation pipe being configured to guide the airflow after being subjected to dust separation performed by the cyclone pipe out of the housing ; wherein the housing defines an air outlet communicated with the ventilation pipe or through which the ventilation pipe extends out of the housing ; the second straight line along which the cyclone pipe extends intersect the first straight line to form an angle greater than or equal to 25° and less than or equal to 90°, the air duct pipe includes a third end for connecting the air inlet pipe and a fourth end for connecting the cyclone pipe , wherein the third end and the fourth end are located at two ends of the air duct pipe in a direction along which the air duct pipe extends; and characterized in that the air duct pipe further includes an oblique portion which at least partially extends along a fourth straight line obliquely intersecting the second straight line and obliquely intersecting the first straight line , wherein a height difference (H) is present between the fourth end and the third end in the second straight line 102. <EOS>