The invention belongs to the field of construction and discloses a construction edge safety protection warning fence which is particularly suitable for temporary protection of building stairs in construction. The construction edge safety protection warning fence comprises at least two spacing uprights forming a guardrail unit, wherein the bottom end of each upright is connected with a floor fixed with the ground. The construction edge safety protection warning fence is characterized in that the bottom between the two uprights is connected with a guard plate, the middle and upper parts of the uprights are connected with a handrail, and the guard plate, the handrail and the uprights are connected through movable articulation pieces. The guardrail consists of multiple uprights and transverse handrails; and two uprights and the handrail between the two form the smallest guardrail unit. The fence is easy to mount and disassemble, is safe and reliable and saves time and labor. With once investment, repeated recycling can be realized. The construction edge safety protection warning fence is suitable for places such as pit periphery, a balcony and stairs without a handrail or a guard plate, periphery of a frame structured floor without a maintaining wall, periphery of a slope-shaped roof, and two sides of a construction hoist and a building corridor.