This invention discloses a manufacturing method for producing three-dimensional food in a very short time without using a mold. The key technology is to establish a figure or word character in a computer-aided design (CAD) software such as CATIA, Pro/E, I-Deals, Solidwork, and AutoCAD or use a built-in figure and word of the Window system. The figure or word character is built into a three-dimensional model and transformed into a file with an *.stl format. Finally, a rapid prototyping (RP) machine is used to build the 3D food, and then the finished goods of the 3D food are produced. The invention promotes the food manufacturing method from 2D to 3D and accomplishes a substantial progress on the application of rapid prototyping.