The invention discloses a reinforcing steel bar threading-sleeving integrated machine and a processing system thereof, and belongs to the field of reinforcing steel bar mechanical connection. The reinforcing steel bar threading-sleeving integrated machine comprises a framework and a lifting shell. First tracks are transversely arranged on the framework, a fixing seat is arranged in the middles of the first tracks, a reinforcing steel bar sleeve is mounted on the fixing seat, two reinforcing steel bar rotary devices are arranged on the first tracks in a slide fit manner and are positioned on two sides of the fixing seat, reinforcing steel bars which are coaxial with the reinforcing steel bar sleeve are connected onto the two reinforcing steel bar rotary devices, the lifting shell is arranged on the framework, two second tracks are vertically arranged on the lifting shell, threading devices which correspond to the reinforcing steel bar rotary devices are arranged on the two second tracks in a slide fit manner and are positioned between the fixing seat and the reinforcing steel bar rotary devices, a control device and motors which are electrically connected with one another are further arranged on the framework, and the motors are in power connection with the two reinforcing steel bar rotary devices and the two threading devices.