Cervical vertebra expander

The utility model aims at providing a cervical vertebra expander, including set screw, nut, strut arm I, strut arm II, the fixed column, strut the blade, set screw, strut the blade and all be equipped with two, set screw's upper end be equipped with two -way external screw thread, nut and set screw's upper end close through thread to match, the fixed column be the cylinder type, offered the external screw thread on the outer circumference of part on the fixed column, strut strutting arm I, strutting arm II and be rectangular type of ware, strut arm I, II passes through the suit hole and can overlap on set screw, through the nut set screw, strut the blade and strut that the arm is fixed is in the same place, the transversal U of the personally submitting type that struts the blade, can be through the mounting groove suit on set screw. This cervical vertebra expander overcomes that prior art operation is complicated, the damage is big, the soft tissue leads out defects such as difficulty, the wild light dimness