The invention discloses a spine intra-articular fixing device. The spine intra-articular fixing device comprises a cambered rod (1), a plurality of main bolts (2) are in threaded connection with the cambered rod (1) in sequence in the length direction of the cambered rod (1), the number of the main bolts (2) is equal to that of spine joints (3), an upper conical head (4) is connected with the top of the cambered rod (1), a lower conical head (5) is connected with the bottom of the cambered rod (1), a plurality of tiny holes are formed in the surface of the upper conical head (4) and the surface of the lower conical head (5), and the curvature of the cambered rod (1) is equal to that of the spine. The spine intra-articular fixing device has the advantages that the structure is compact, the restoration stage is shortened, connection is firm and reliable, and pains of a patient can be reduced.