Combined angle steel connected with bolts is a common structure in power transmission line project, the calculation contents of which include: the overall stability of combination section around virtual axis, the connecting bolt shear, buckling and bending of component angle, strength of battens on star-battened angle member. However, the current code GB 50017—2003 (“Code for design of steel structures”) has not given the calculation formula, in which the battens distance is more suitable for welded or riveted combination section. The steel structure code in Europe also has not given the calculation formula of connecting bolt shear. Aimed to the decrease of bearing capacity caused by the sliding of ordinary bolt connection, and the small shear deformation of combined angle steel on the empty axis, the pads thickness caused by the increases of virtual axis’ gyration radius can be not considered. But for the star-battened combined angle steel around virtual axis with large shear deformation, the equivalent slenderness ratio should be corrected and amplified to calculate its overall stability, according to the combination principle of battened member with lattice type axis compression; the calculate formulas of connecting bolt’s shear and component angle’s bearing capacity are proposed, according to the flexural deformation.