Provided is an artificial vertebral fixing system. The artificial vertebral fixing system includes: an artificial vertebral main body, arranged between adjacent human physiological vertebrae; two longitudinal connecting rods, respectively arranged at two sides of spinous processes of the human physiological vertebrae; a transverse connecting screw, connected between the artificial vertebral main body and each of the longitudinal connecting rods; and a connecting portion, connected to the artificial vertebral main body; when the connecting portion is provided with a self-tapping through hole, the transverse connecting screw is formed into thread structure by self-tapping when being screwed to the self-tapping through hole; and when the connecting portion is provided with a threaded hole, the transverse connecting screw is matched with the threaded hole. According to the technical scheme of the disclosure, the problem that the artificial vertebra has a poor stability in the related technology is effectively solved.