Main tower area steel truss girder erection method of base support auxiliary frame beam crane and base support

The invention discloses a main tower area steel truss girder erection method of a base support auxiliary frame beam crane and a base support. The main tower area steel truss girder erection method includes the following steps: a base support and a first all-rotation frame beam crane are installed; a first panel steel truss girder is erected and placed in position; steel truss girders of other panels in a main tower area are erected; and a second all-rotation frame beam crane is assembled in four steps. The base support is composed of a column, a column bearing beam, a vertical connection system, a planar connection system, a front-rear horizontal distribution beam, a bottom anchor device and a distribution beam anchor device. The main tower area steel truss girder erection method has the advantages of being small in construction investment, short in time for using a floating crane, capable of enabling erection of steel truss girder and assembly of the frame beam crane not to be limited by water level or crane