A dust collector and a device for beating dust in the same. The dust collector (10) includes: a main body (101) with a clean air outlet (1011); a filter section (102) set at the clean air outlet (1011); and a device for beating dust. The device for beating dust includes: a sliding rail (103) set on the outside surface of the main body (101) and opposite to the clean air outlet (1011); a slider (104) slidably set on the sliding rail (103); a poker rod (105) rotatably set on the slider (104); and a beating dust member (106) used for beating the filter section (102) and set on the poker rod (105).