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 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 is present between the fourth end and the third end in the second straight line 102.