Reusable tree cold-proof device for landscape garden

The tree cold-proof device comprises a cold-proof cylinder, fixing lantern rings are arranged at the upper end and the lower end of the cold-proof cylinder respectively, threaded grooves are symmetrically formed in the outer sides of the two ends of a semicircular cylinder respectively, a semicircular groove matched with the semicircular cylinder is formed in one end of each semicircular ring, and the other end of each semicircular ring is provided with a threaded groove matched with the threaded groove. The outer wall of the semicircular groove is provided with a mounting hole, a screw penetrating through the mounting hole and extending into the threaded groove is arranged outside the semicircular ring, threaded holes are formed in the upper end and the lower end of the semicircular ring, threaded rods are arranged in the threaded holes in a penetrating mode, an arc-shaped groove is formed in the inner wall of the semicircular ring, and an arc-shaped plate is arranged in the arc-shaped groove. The device has