Tower crane perpendicularity monitoring device

The utility model discloses a tower crane perpendicularity monitoring device which comprises a fixing part used for being fixed to the side face of a tower crane, the fixing part is further connected with a connecting rod extending in the direction away from the tower crane in the horizontal direction, and the part, close to the free end, of the connecting rod is rotationally connected with a natural drooping part. A laser irradiation part is arranged in the natural drooping part, and the natural drooping part is used for driving the laser irradiation part to vertically and downwards point to the ground under the action of gravity. The tower crane perpendicularity monitoring device can monitor the perpendicularity of the tower crane under the conditions that the site or environment is limited and instrument observation at night is influenced, so that the safety performance of the tower crane in use is ensured, the monitoring efficiency is improved, and the labor cost is saved. 本申请公开了一种塔吊垂直度监测装置，包括用于与塔吊侧面固定的固定