To solve the problem of complex surface reconstruction in craftwork design, with ceramic piglets as an example, we use reverse engineering software to reverse-reconstruct and digitize the complex curved surface of the crafts and obtain corresponding digital models. Through examination and comparison, the key surface deviations between reconstructed digital models and physical models all come within 0.08 mm, thus the digital design can greatly improve the design and development of complex surface products, shorten the development cycle and improve the production efficiency.