Treatment: According to the situation l、 stringy fracture 2、 sunken fracture 3、 smashed fracture 4 front back wall fracture 5 base fracture(frontonasal fracture):restore the function of frontal sinus Principle: To isolate the communication between frontal sinus and cranial cavity to prevent rhinogenic complications, to keep the frontal part from deformationTreatment：According to the situation: 1、 stringy fracture 2、 sunken fracture 3、 smashed fracture 4、 front & back wall fracture 5、base fracture (frontonasal fracture): restore the function of frontal sinus. Principle：To isolate the communication between frontal sinus and cranial cavity, to prevent rhinogenic complications, to keep the frontal part from deformation