The invention relates to a clearing-cutting machine provided with an electricity driving motor (2) and a tool (5) rotatablely drived by a driving axes (4). In order to avoid increase of a ratation speed during no-load operation from excedding a work ratation speed and avoid too high power consumption, a control unit (20) is provided, a first work characteristic curve (I) and a second characteristic curve (II) are provided for the control unit. The control unit (20) makes the electricity driving motor run according to the first work characteristic curve (I) during no-load operation, and run according to the second work characteristic curve (II) during load operation.