Plugging machine arm

The utility model discloses a pluggable machine arm, which comprises a quick-release fixing seat, a quick-release connecting rod, a quick-release connecting rod, a first connecting rod, a second connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, and is characterized in that one end of the quick-release fixing seat is fixed on a machine body, and external threads are arranged on the circumferential outer surface of the other end of the quick-release fixing seat; one end of the quick-release seat is connected with the other end of the quick-release fixing seat, the other end of the quick-release seat is connected with an arm body, and a circle of protrusion is arranged on the outer surface of the circumference of the quick-release seat; the fixing lock ring is used for being arranged on the quick-release fixing base and the quick-release base in a sleeving mode, internal threads matched with the external threads are arranged on the inner surface of the circumference of