The invention discloses a digital camera-based three-dimensional measurement method of a shoe tree. The three-dimensional measurement method comprises the following steps: step 1, shoe tree wiring, namely wiring is performed as per the characteristics determining the geometry of the shoe tree, and a target curve needing to be rebuilt is marked to serve as a mark curve; step 2, image taking, namely, the shoe tree marked by the digital camera is taken from different angles to obtain a plurality of images; step 3, image characteristic curve obtaining, namely the lines of mark curves of the shoe tree in various images are subjected to image processing to extract the frameworks of the mark curves, and the frameworks are fit by utilizing an improved snake model so as to obtain the image characteristic curves; and step 4, three-dimensional rebuilding of the image characteristic curves namely, a three-dimensional characteristic curve is obtained and is fit into a three-dimensional shoe tree model. Compared with a conventional method, the digital camera-based three-dimensional measurement method has the advantages of simple measurement hardware, low price, flexible measurement method, and can perform three-dimensional rebuilding of the characteristic curves under the condition that part of image curves is lost or blocked.