Building engineering steel structure welding position monitoring device

The utility model discloses a constructional engineering steel structure welding position monitoring device, which comprises a device main body, steel, an external structure and an internal structure, and is characterized in that the external structure comprises a motor controller, a first fixing plate, a reciprocating motor, a threaded rod, a clamping block, a monitoring probe, a second fixing plate, a first rotating rod, a first roller, a roller groove, a second rotating rod, a second roller and steel; the internal structure comprises air holes, a motor and a mainboard, the device body is provided with a monitoring device, the top end of the monitoring device is fixedly connected with a motor controller, the interior of the motor controller is fixedly connected with a first fixing plate, the side wall of the first fixing plate is fixedly connected with the side wall of a reciprocating motor, and the output end of the reciprocating motor is fixedly connected with a threaded rod. According to the monitoring d