The embodiment of the invention discloses a preparation method of an orthopedic brace. The preparation method comprises the steps of collecting X-
ray images of deformed parts; obtaining bone data of the deformed parts according to the X-
ray images; collecting three-dimensional
infrared scanning images of the deformed parts; obtaining deformed
skin data according to the three-dimensional
infrared scanning images, matching the bone data with the
skin data, rebuilding a
bone model and a
skin model of the deformed parts, loading an initial model of the brace to the
bone model and the skin model, acquiring the pressure of the initial model of the brace to the skin model and the orthopedic amplitude of the
bone model through the finite
element analysis, through adjusting the pressure of the initial model of the brace to the skin model, changing the orthopedic amplitude of the bone model, enabling the pressure to be less than the threshold pressure, obtaining the final model of the brace, and printing the final model of the brace by utilizing the 3D (three-dimensional) printing technology. According to the preparation method of the orthopedic brace, through the finite
element analysis, the orthopedic amplitude of the brace is predicted and improved, the orthopedic comfort is balanced, and the practicability is high.