Myotonic squint is one of the common orthopedic disorders in pediatrics. The main manifestation is head and neck deviation, which is commonly known as “crooked neck”. The main cause of this condition is the fibrosis contracture of the sternocleidomastoid muscle, which has lost its original muscle elasticity and restricted the movement of the neck. Myoclonus can be treated by massage and pulling within 1 year of age, but surgery is recommended after 1 year of age. Traditionally, an incision is made in the neck, which is about 2cm long, and the sternal head of the sternocleidomastoid and the clavicular head are cut off; there are scars after surgery. At present, our hospital has developed a lumpectomy method based on traditional treatment for myotonic squint, which is characterized by small incisions and minimal damage. A 0.8 cm incision is made in the axilla and the lumpectomy is inserted into the neck. Two 0.3 cm incisions are made below the clavicle and the operating forceps and electric knife are inserted to cut the clavicular and sternal heads of the sternocleidomastoid muscle. The incisions are almost unrecognizable after the lumpectomy, which meets the cosmetic requirements, and the lumpectomy has a magnifying effect, so the sternocleidomastoid clavicle head and sternal head are completely cut under direct vision. The limitation of this procedure is that in older children, it is difficult to cut the papillary head of the sternocleidomastoid muscle if needed. Overall, the diagnosis of myotonic squamous neck is early and this technique can meet the aesthetic requirements of most patients.