Cranial defect is a common sequela after craniectomy, for cranioplasty, most experts have formed a consensus that if the diameter of the defect is larger than three centimeters, and the defect site is aesthetically displeasing, and there are clinically relevant clinical symptoms, such as dizziness, headache, or serious psychological burden, which affects the daily life and work, cranioplasty should be carried out. Patients with cranial defects will consider the season for cranial repair, thinking that if summer is too hot, it will easily lead to postoperative infections, etc. So, what is the best season for cranial repair, and is winter okay? In fact, the best time for cranial repair has nothing to do with the season, many traditional viewpoints believe that cranial repair surgery needs to be carried out between 3-6 months after surgery, but now more and more scholars believe that as long as the patient’s condition is stabilized after craniofacial surgery, he or she can undergo cranial repair surgery as early as possible, usually within 3 months, so that the patient’s recovery after the surgery is faster, and the recovery of cerebral blood flow is also faster. The sooner the surgery is performed, the faster the patient will recover and the faster the cerebral blood flow will be restored. The earlier the cranial repair is performed, the earlier the mental burden caused by the skull defect can be relieved, the other damages caused by the skull defect can be terminated, and the quality of life of the patient can be improved. There are hospitals applying peek material can make the postoperative effect recover better, peek material has the advantages of comfort, non-thermal conductivity, strong hardness, elasticity, ray transmittable, etc., and can be three-dimensional shaping, restore the patient’s cranial bone original appearance, a lot of patients after the use of patients have responded to the postoperative discomfort does not occur, at present, the peek material has been recognized by a lot of people, has become a more than titanium mesh more excellent Repair material.