The invention discloses a tree digging machine. The tree digging machine comprises a loading machine, wherein a tree digging device is arranged at the front end of the loading machine, the tree digging device comprises a tree claw device and a driving device, the tree claw device is used for breaking a tree root to in a digging mode to form a wrapping shape, the driving device is used for drivingthe tree claw device, and the driving device drives the tree claw device to rotate and be tightened to form soil package for fixing the tree root. Research and design of the automatic tree digging machine have great significance and practical value for urban greening and environmental beautification, the labor efficiency is greatly improved, the passive situation that manual digging is conducted through transmission is changed, the utilization rate of the loading machine is improved, trees are convenient to transport and operate, and the requirement for wide application and popularization is met.