The invention discloses a liquid transfusion device for landscaping and a using method of the liquid transfusion device. The liquid transfusion device comprises a shell and further comprises a protection mechanism, wherein the protection mechanism is specifically composed of a supporting plate, a protection cover, a spring clamping block, a flow guide pipe, a rotating clamping block, a sealing bearing and a needle tubing, the supporting plate is welded to the surface of the shell, the flow guide pipe is installed on the inner wall of the supporting plate, the spring clamping block is welded to the inner wall of the supporting plate, the protection cover is detachably connected to the surface of the supporting plate, and the rotating clamping block is rotationally connected to the inner wall of the protection cover in a matched mode. When the whole device is used, the whole device is in a cartoon image, the overall attractiveness of the environment cannot be damaged, furthermore, the whole device is of a multiple fixing structure, fixing is conducted under the condition that surface tissue of a tree trunk is not damaged, the overall external force resistance is greatly improved, the overall device can be repeatedly used, the garden maintenance cost is greatly reduced, and the overall device can be suitable for tree liquid transfusion devices for landscaping in a large range.