E3Gen is a novel digital avatar generation method that can generate high-fidelity avatars in real time. It features detailed clothing wrinkles and supports comprehensive control over multiple perspectives and full-body poses, as well as attribute transfer and local editing. By encoding 3D Gaussian into a structured 2D UV space, E3Gen addresses the incompatibility issue between 3D Gaussian and current generation processes and explores the expressive animation of 3D Gaussian in training involving multiple subjects.