The invention discloses a soft air pipe automatic production line and relates to the technical field of automatic equipment. The soft air pipe automatic production line comprises a supply mechanism, ashaping mechanism and a welding mechanism. The shaping mechanism comprises a guide assembly and a forming assembly. The guide assembly comprises a first guide roller and a first pressing roller set erected above the first guide roller. The forming assembly comprises a first support and slider seats slidably arranged at the two ends of the first support correspondingly. The slider seats are provided with a forming frame for forming and passing of the edge of fabric. The welding mechanism comprises a sizing clamp, a welding arm and a pressing assembly. The end, toward the welding arm, of the sizing clamp is provided with an open frame. The welding arm is provided with a welding handle. The welding handle is arranged at the discharge end of the open frame movably in an inserted mode. The pressing assembly is connected with the discharge end of the open frame in a spaced mode. A second guide roller and a second pressing roller set erected above the second guide roller are included. According to the soft air pipe automatic production line, the fabric is machined into soft air pipes automatically, the automation degree is high, production efficiency is high, and soft air pipes of super-large diameters and sizes can be manufactured.