Engineering machinery

The invention provides engineering machinery which comprises a fixed part, a rotary part, a rotary mechanism, an anchor seat, an anchor pin, an anchor power unit and a control system; the anchor pin is arranged on the rotary part; the anchor seat is arranged on the fixed part; the rotary mechanism can drive the rotary part to rotate relative to the fixed part; the anchor power unit comprises an electromagnet; the electromagnet is arranged on the fixed part and is arranged above the anchor pin; the electromagnet can drive the anchor pin to drive; the control system comprises a detection module, a processing module and an execution module; the detection module is used for detecting the relative positions of the anchor pin and the anchor seat; the processing module is used for receiving and processing the information that the detection module detects and sending a command; and the execution module controls the rotary mechanism to rotate according to the command, and/or controls the electromagnet to power on/off,