MACHINE HEAD LOCKING STRUCTURE OF COMPOUND SAW AND COMPOUND SAW

Disclosed are a machine head locking structure of a compound saw and a compound saw. The machine head locking structure comprises a locking fastener (7) located on one of a frame (5) and a working turntable (2) of the compound saw, wherein an overlapping body (71) is provided on the locking fastener (7), an overlapping cooperation body (51) able to form a lock catch with the overlapping body (71) is provided on the other one of the frame (5) and the working turntable (2), and the overlapping body (71) is a protrusion or recess on the locking fastener (7) and the overlapping cooperation body (51) is a matching recess or protrusion. The locking fastener (7) can move between a locking position and an unlocking position. When in the locking position, the overlapping body (71) on the locking fastener and the overlapping cooperation body (51) are fitted together; and when in the unlocking position, the overlapping body (71) on the locking fastener is disengaged from the overlapping cooperation body (51). L'inventio