The invention provides a tooth correcting appliance and a use method of the tooth correcting appliance. According to the tooth correcting appliance and the use method, a molar distalization palatal bar and a micro-implant anchorage nail are combined for use, and the maxillary molar is distalized by utilizing the elastic deformation of a nickel-titanium tension spring. The tooth correcting appliance is simple in structure and small in size; when the tooth correcting appliance is cemented to the oral cavity of a patient, the foreign body sensation is tiny, the exertion of the effects of the tooth correcting appliance does not depend on the coordination of a patient, and the effects are stable; the tooth correcting appliance is easy to manufacture and operate, and the whole set of device is low in cost and price, and has no high requirements on the technologies of technicians; the blocking of the position of the micro-implant anchorage nail for the root of the distalized maxillary molar does not need to be considered, and thus the workload during the treatment period can be effectively reduced; the distal tilting and lingual rotation can not be generated, and thus the effects of improving the occluding relation and treating the posterior are achieved.