The study aims to improve the efficiency of clothing production and make the clothing design diversified and flexible. First, the design under the mass customization mode (MCM) based on digital technology (DT) is studied. Second, the development direction of clothing production under MCM is discussed through the analysis of the current situation of clothing production. Finally, the prospect of clothing design and production under MCM is predicted. The results show that the application of DT to clothing design under MCM can make the style change flexibly in the design as needed and effectively improve the efficiency of clothing production. With the help of DT, manufacturing enterprises will increase their investment in clothing production under MCM in the next 5 years, and the consumption rate of consumers for the clothes under MCM will also increase sharply. And the profit made under the mode will be four times as that of the previous. This study provides a reference for the development of MCM and helps understand the MCM further. Finally, the simulation results of clothing design show that the clothing designed following DT is faster, more flexible, and diversified, and DT dominates the production scale of clothing production.