The invention discloses a manufacturing process for an aluminized steel grounding device of a transmission tower to overcome the problems of proneness to corrosion and rough product surface in application of the grounding devices of transmission towers, belonging to the field of transmission and transformation projects. The manufacturing process comprises the following steps: heating for oil removal; pickling for rust removal and washing with water; activation and passivation; heating and drying; rapid hot dipping and aluminizing; electric welding in groups; etc. So oil stains on the surface of a workpiece are effectively removed, and leakage defects are prevented from forming on the surface of a material. The manufacturing process provided by the invention improves the plating quality ofthe workpiece and reinforces the anticorrosion performance of the grounding device. A hot aluminizing step and a diffusion aluminizing step in the prior art are fused into the rapid hot dipping and aluminizing step, so process efficiency is substantially improved, operation procedures are reduced, and the aluminized outer wall of the workpiece is made more smooth. Meanwhile, the process improves the mechanical properties of the grounding device, allows the structure of the grounding device to be stable, guarantees process safety, is especially applicable to manufacturing of the grounding device for the transmission tower, and has high economic value and good market application prospects.