The invention relates to a dynamic non-fusion connector which belongs to the field of medical apparatuses. The dynamic non-fusion connector is matched with spinal screws and used for treating diseases of spinal instability, deformity, spondylolisthesis, spinal canal stenosis, fracture, and the like. The dynamic non-fusion connector comprises a spring shaft (1), a limit sleeve (2), a limit core (3), a stud (4) and a fixed shaft (5) and is characterized in that the left end of the spring shaft (1) adopts a polished rod design and is provided with an internal thread through hole, and the right end of the spring shaft (1) adopts an annular spring structure and is provided with a step hole, and gaps and small circular holes are arranged among rings of the annular spring structure; and a tapered face, a step cylinder surface and a notch are arranged on the outer surface of the limit sleeve (2), and a step through-hole is arranged in the center of the limit sleeve (2). An application method of the dynamic on-fusion connector comprises the following steps of: firstly determining the embedded depth and orientation of the spinal screws and the length of the dynamic non-fusion connector, drilling a hole, holding the spinal screw, embedding into a vertebral body, embedding other spinal screws, then embedding the dynamic non-fusion connector, screwing a top thread in, and compressing the dynamic non-fusion connector to a final locking position so as to realize the dynamic non-fusion fixing of a system.