The invention relates to a safety turnover saw, which comprises frame, workbench hinged to the frame with hinge axle, and saw frame axially supported on workbench, wherein said saw frame is mounted with motor and saw plate driven by motor. The invention is characterized in that: the frame has safe switch which will close contactor when the workbench is horizontal and break off the contactor when the workbench is not horizontal; and the contactor is serially connected into power circuit of motor. Compared with present technique, the invention can avoid man control, and cut off power by safe switch, to improve safety.