The inclined surfaces with the same angle are used to expand mutually in the fixing sleeve. The utility model has the advantages of good interchangeability and simple replacement.

The invention discloses a tree body injecting machine which comprises an electric drill device, an injecting part, a fixing sleeve and a medicine discharging device.

Metal mark rings are respectively sheathed on the inner tube in the inner cavity of the elastic saccule and the upper and the lower ends of the elastic saccule.