Tree infusion device and method capable of controlling infusion dosage

The invention relates to a tree infusion device and method capable of controlling an infusion dosage. The device comprises an infusion bottle, a bottle cap, an infusion control mechanism arranged at the bottom of the infusion bottle, a liquid storage chamber which is arranged in the infusion bottle and is located under the infusion control mechanism, and a syringe needle connected with the bottle cap. By the aid of the tree infusion device, nutrition liquid can be quantitatively infused into trees and the wastes of the nutrition liquid are avoided; the planning and controllability of infusion are improved; meanwhile, the nursing of workers is reduced and the labor cost is reduced. At the same time, the infusion speed of the device is increased under the action of external power, and the possibility of blocking the infusion syringe needle is reduced. Furthermore, the effects that the liquid is filled once and is quantitatively infused for multiple times are realized by the tree infusion device so that the tree infusion efficiency can be remarkably improved and the tree infusion cost can be greatly reduced.