Building construction guardrail reinforcing device

The utility model discloses a building construction guardrail reinforcing device which comprises a vertical cylinder, an adjusting mechanism and a fixing mechanism, the adjusting mechanism is arranged at the top end of the vertical cylinder, a driving shaft is driven to rotate through a hand-cranking wheel in the adjusting mechanism, and the driving shaft enables a bolt on a driving wheel to drive a dividing wheel to rotate. The rotating shaft in the dividing wheel drives the bottom plate on the left side to rotate, so that angle adjustment is achieved, the protection position of the protective fence can be conveniently adjusted according to the actual situation during protection operation, the flexibility is high, and the protective fence can adapt to different working scenes; in the fixing mechanism, a spring drives a clamping block to move downwards, the clamping block pushes an inserting rod and an inserting head to be inserted into the ground downwards, the bottom plate can be fixed, the stability of the