Cantilever scaffold I-steel deflection and frame body perpendicularity monitoring and early warning device

The invention discloses a monitoring and early warning device for I-steel deflection and frame body perpendicularity of a cantilever scaffold. The monitoring and early warning device comprises a laser ranging module and an alarm device, the laser ranging module comprises a first laser transmitter, a first receiver, a second laser transmitter and a second receiver; the first laser transmitter is arranged at the tail end part of the cantilever scaffold I-shaped steel, the first receiver is arranged at the support end of the cantilever scaffold I-shaped steel, and the first laser transmitter horizontally points to the first receiver so as to complete the deflection measurement of the cantilever scaffold I-shaped steel; the second laser transmitter is arranged at the tail end of the cantilever scaffold I-shaped steel, the second receiver is arranged at the top end of the scaffold vertical rod, and the second laser transmitter vertically points to the second receiver so as to complete scaffold perpendicularity mea