The causes of malocclusion of teeth are mostly due to poor breastfeeding posture, retention or premature loss of deciduous front teeth, congenital absence of upper permanent incisors, bad living habits, insufficient abrasion of deciduous teeth, systemic diseases, hereditary mandibular protrusion and so on. It has a great influence on our health and image. 1, front traction correction device. It is suitable for early skeletal anterior crossbite with maxillary hypoplasia and mandibular protrusion, and can be used in tooth replacement or early permanent teeth. 2. Functional orthodontics. It is suitable for early skeletal anterior crossbite and functional anterior crossbite, and can be used in the period of tooth replacement, especially in the late period of tooth replacement. 3. Removable maxillary cushion tongue spring appliance. It can be used to correct any malocclusion of anterior teeth, either alone or in combination with other orthopedic devices such as chin pockets and orthoses such as fixators. 4. headgear and chin bag correction device. It is suitable for patients with early skeletal anterior teeth malocclusion and mandibular protrusion. Can be used for late deciduous teeth, replacement teeth or early permanent teeth. Can be used in combination with oral appliances, such as dental cushion tongue spring appliance.