对３１例有胸锁乳突肌包块和２０例无包块初诊为肌性斜颈婴幼儿，每２月进行Ｂ超检查，发现超声表现与病理变化相符，与正常比较超声影像可以是强回声、中等回声或低回声。随访发现持续强回声是肌肉组织纤维化的表现，不均质回声可变为均质，且回声减弱是预后好的表现。对该病超声诊断及超声在治疗随访中的作用进行了讨论。 31 cases of sternocleidomastoid muscle mass and 20 cases of non-mass newly diagnosed as muscular torticollis infants, B-ultrasound every 2 months and found that the performance of ultrasound and pathological changes consistent with the normal ultrasound image can be strong Echo, medium echo, or low echo. Follow-up found that persistent strong echo is the manifestation of muscle tissue fibrosis, heterogeneous echoes can become homogeneous, and reduced echo is a good prognosis. The role of ultrasound diagnosis and ultrasound in the treatment follow-up was discussed.