The invention discloses a full-automatic fracture steel plate model personalized reconstruction method. The method comprises the following steps of broken bone image separation; broken bone three-dimensional reconstruction; broken bone axis extraction, wherein an initial sample matrix Z of three-dimensional models of a first broken bone and a second broken bone is generated, the sample matrix is subjected to centralization to obtain a matrix X, characteristic values of a covariance matrix C and a covariance matrix C of the matrix X are calculated, and characteristic vectors corresponding to the maximum characteristic values are selected as broken bone axes of the first broken bone and the second broken bone; broken bone section segmentation, wherein characteristic points are extracted from the three-dimensional models of the first broken bone and the second broken bone, the characteristic points are divided into the head part and the tail part according to a length buffer value and a mesh model, and four sets of head and tail characteristic points of the first broken bone and the second broken bone are formed separately; broken bone registration; virtual steel plate pre-bending, wherein point selection is conducted on spliced broken bone fracture surface attachments, and the size and shape of the steel plate model are determined; a normal vector value of each triangular patch is calculated, thickening is conducted on each plane to a certain extent according to the normal vector direction, the gaps are filled up, and finally the simulated steel plate three-dimensional data is obtained.