Abstract: This invention discloses an intervertebral fixation device including a plate member, a body, and at least one bending portion disposed on the plate member. The thickness of the bending portion is slightly smaller than the thickness of the plate member and ear portions, such that the bending portion is provided for flexibly adjusting a curvature of the plate member of the intervertebral fixation device, and an ear portion and another ear portion on the plate member can be adjusted flexibly to be attached to the two cervical vertebrae, and the intervertebral fixation device can match with the physiological curvature of each patient's cervical vertebrae, so as to overcome the shortcomings of a conventional intervertebral fixation device having a protrusion after a surgical operation is performed, and prevent a locking element secured to a conventional intervertebral fixation device from being loosened, and avoid another surgical operation of a patient.