We experienced a case of transferring the peroneus longus tendon to the peroneus brevis with soft-tissue release in Charcot-Marie-Tooth (CMT) disease. The patient was an 8-year-old girl who had bilateral cavovarus foot deformity with predominantly anterior cavus. Hindfoot varus was flexible in the Coleman block test. So we performed surgery by soft-tissue procedures alone which not only may restore more normal biomechanics and posture of foot, but prevent or delay the need for extensive bony procedures. It was performed on the right foot, at first and after one month, it was combined with peroneus longus transfer to sufficiently restore ankle eversion strength in the left foot. Three months after the operation, the left foot showed further correction, and the patient was more satisfied. The transfer of the peroneus longus tendon is useful for correcting cavovarus deformity in CMT.