Spiral welding steel-plastic composite pipe with coating reinforcing ribs

The utility model discloses a cladding reinforcing rib spiral welding steel-plastic composite pipe which comprises a plurality of composite pipe units, each composite pipe unit sequentially comprises an outer plastic layer, a steel belt spiral welding layer and an inner plastic layer from outside to inside, the outer plastic layer is arranged on the steel belt spiral welding layer through an outer bonding layer, and the inner plastic layer is arranged on the steel belt spiral welding layer through an inner bonding layer. The inner plastic layer is arranged on the steel belt spiral welding layer through the inner bonding layer; the adjacent composite pipe units are connected through welding, outer welding spots and inner welding spots are formed at the welding positions, and reinforcing ribs are arranged on the composite pipe units. The steel pipe is simple in structure and convenient to use, reduces the proportion of steel, effectively solves the problems that in the prior art, the dead weight and the compres