Adjustable riverway protective fence

The utility model relates to the technical field of guardrails, and discloses an adjustable riverway guardrail which comprises a plurality of sections of handrails and stand columns, the stand columns are vertically fixed to the two sides of each section of handrail, and discs are welded to the outer rings of the upper portion and the lower portion of one stand column between the handrails in a surrounding mode. Connecting plates are welded and fixed to the side edges of the outer rings above and below the stand column higher than the other side of the surface of the disc, the outer ring of the stand column above the disc is rotatably sleeved with the side edges of the connecting plates, a plurality of screw holes are evenly formed in the outer ring of the disc, a through hole is formed in the middle of the surface of each connecting plate, and the through hole is aligned with the screw hole in the surface of the disc under the through hole; according to the technical scheme of the utility model, the railing