(1) persistent sternocleidomastoid contracture with restricted head rotation for more than 12-15 months; (2) persistent sternocleidomastoid contracture with progressive facial dysplasia on one side; (3) myotonic levator neck found over 1 year old. (3) Myotonic levator found more than 1 year old, or those who have not improved after 1 year of conservative treatment should consider surgery. (1) Sternocleidomastoid muscle release: within 5 years old, the head of clavicle and sternal head can be cut off and released, and above 6 years old, the mastoid head should be released; (2) Z-shaped lengthening of sternocleidomastoid muscle In order to make the patient’s postoperative neck appearance beautiful, some scholars use “Z” shaped lengthening of sternocleidomastoid muscle. Note: Injury to the subclavian artery, vein, common jugular vein and paracervical nerve should be avoided during surgery.