Building construction guardrail

The utility model discloses a building construction guardrail is formed by a plurality of guardrail unit connections, the guardrail unit includes first horizon bar and first telescopic link, the quantity of first horizon bar is three, and the equal slide kit in both ends of first horizon bar has a second horizon bar, the same second telescopic link of the equal fixedly connected with in middle part of first horizon bar, first telescopic link equidistance distributes on the second horizon bar, the both sides of guardrail unit are equipped with fourth connecting block and the first connecting block of fixing on corresponding first telescopic link respectively. The utility model discloses in, first horizon bar and the cooperation of second horizon bar are used and to be adjusted the singly length of a guardrail unit by the manpower, the setting up of corresponding telescopic link makes highly can adjusting of single guardrail unit, the utility model discloses simple structure, and the guardrail unit can make up