Tower crane standard joint main limb welding device

The invention discloses a tower crane standard joint main limb welding device. The tower crane standard joint main limb welding device comprises a standard joint welding device body, an installing frame is arranged on the top of the standard joint welding device body, an installing base is connected to the inner bottom wall of the installing frame, and a driving motor is connected to the top of the installing base; and supporting feet are installed at the bottom of the standard joint welding device body, a fixture mechanism is arranged on one side of the supporting feet, and a fixing frame isconnected to one side of the fixture mechanism. According to the tower crane standard joint main limb welding device, through arrangement of the installing base, an operator can assembly and disassembly the driving motor in the manner of rotating a fixing sleeve, operation is easy and convenient, the bottom of the driving motor is stable in structure, supporting of the bottom of the driving motorcan be reinforced through