Perpendicularity detection device for column template

The utility model discloses a verticality detection device for a column template, which comprises an upper section rod, a middle section rod and a lower section rod which are mutually nested in a sliding manner, a hinged folding mechanism, an automatic take-up and pay-off box fixedly connected to the end part of an upper flat plate, and a steel ruler hinged to the lower section rod, the automatic take-up and pay-off box comprises a take-up and pay-off mechanism and a circuit control module, the take-up and pay-off mechanism comprises a motor, the motor is in transmission connection with a winding roller through a transmission shaft, the lower end of a thin wire is fixedly connected with a wire hammer, the upper end of the thin wire is fixedly connected with the winding roller, and the other end of the transmission shaft is in transmission connection with an encoder. The plumb bob is automatically wound and unwound by adopting an electric control method, and meanwhile, the fine line used for being connected wi