The free-teaching programming welding robot cell is specifically designed for structural steel I-beam welding. Employing teach-free programming logic, it allows for rapid welding path planning through parameterized input. Deeply integrated with an I-beam welding machine, the system automatically matches welding trajectories and process parameters based on beam height, flange width, and weld type, achieving stable and highly consistent I-beam welding operations. The welding robot cell is equipped with a high-rigidity clamping and positioning structure, ensuring workpiece stability during long weld seams while minimizing manual intervention and changeover time.