The invention discloses a novel tree shaping device. The device includes a straight plate, the right side of the straight plate is symmetrically provided with two inserting parts, a lock circular ring is arranged between the two inserting parts in a matched mode and is in a semi-ring shape and provided with two flat surfaces, the flat surfaces are provided with lock shafts cooperated with the inserting parts in use and further provided with wear protection plates, the lock shafts pass through the wear protection plates, the wear protection plates are connected with the flat surfaces in an attached mode, circular grooves are formed in the outer top walls of the lock shafts, raised heads are arranged at the ends of the clock shafts, corners on the outer side of the lock circular ring are symmetrically provided with reinforcing bases, and the reinforcing bases are internally provided with fastening bolts. The device can bundle tree trunks and tree branches for shaping through the lock circular ring, the bundling force is large, and bundling is reliable.