The E-FLY multi-functional industrial drone frame represents a pivotal product category in unmanned systems, designed for extreme versatility across sectors. This robust drone frame serves as a universal platform for applications including firefighting, inspection, search and rescue, agricultural spraying, and educational training. The core innovation of our agricultural drone frame lies in a modular architecture that provides reserved design space, empowering users to freely customize and DIY payloads and accessories tailored to specific operational scenarios. Featuring a high-strength, integrated structure crafted from durable materials, the frame guarantees longevity and reliability in demanding environments. Furthermore, its user-centric design philosophy ensures that installation and debugging can be accomplished with simple tools, significantly reducing setup time and technical barriers. This category is defined by its adaptability, resilience, and its role as a foundational enabler for diverse drone solutions.