The invention belongs to the field of curved surface automatic identification and curved surface structure parameter intelligent extraction technology, and discloses a curved surface automatic identification and curved surface structure parameter intelligent extraction. The invention provides the characterized curved surface automatic identification method which is characterized in that data volume spatial points which comprise a curved surface are divided into central curved surface frame points, curved line frame points and simple points; the curved surface frame points and the curved line frame points form a central axis frame; and the simple points are ineffective points which have no contribution to the central axis frame. The central curved surface and the central axis frame are identified in a classified and stepwise manner. A topological structure characteristic of the three-dimensional digital image is finely described. The structure parameter of the curved surface is intelligently measured. The method can realize automatic identification of a curved surface space and a linear space and constructs a central axis frame structure which comprises a curved surface three-dimensional spatial structure. Furthermore the structure parameter of the curved surface is intelligently measured. The method has advantages of short working period, high repeatability and high measurement accuracy. Furthermore a big data processing algorithm is adopted so that high convenience and high efficiency are realized.