Tower crane safety device

The utility model relates to a tower crane safety device, belonging to the tower crane manufacturing technology field, which comprises three modules of a sampling module, an analyzing module and a control and execution module. The sampling module is composed of a tension sensor and an analog-to-digital converter; the tension sensor is arranged at the pull rods of the two arms for obtaining the voltage being transmitted to the analog-to-digital converter and the analog signal is converted to digital signal, which is finally outputted. The analyzing module mainly performs data comparison and analysis of the moments at the both sides and the action of the control and execution module is decided according to the moments. The control and execution module is used for adjusting the tower crane moment or responding the input values. The utility model has the advantages of safety, reliability, easy operation and achieving the moment adjusting and safety guard.