Ultralight-Digital-Human is an ultra-lightweight digital human model capable of real-time operation on mobile devices. This model is open-source and, to the developer's knowledge, is the first of its kind to be so lightweight. Its key advantages include a lightweight design suitable for mobile deployment and the capability for real-time performance. It leverages deep learning technologies, especially in the applications of face synthesis and voice simulation, allowing the digital human model to deliver high-quality results with low resource consumption. The product is currently free, primarily targeting tech enthusiasts and developers.