With the continuous maturity of material technology

composite materials are gradually increasing in the application of transmission line tower engineering. In order to study the lightning protection performance of composite cross arm tower in 110 kV transmission line

the simulation model of composite tower of 110 kV typical transmission line with glyph tower is established in ATP-EMTP software. The lightning withstand level of composite tower is studied from the ground elevation and the different length of cross arm. According to the calculation results of lightning withstand level

the structure scheme of composite tower which can satisfy the optimization of lightning protection performance and safety margin at the same time is put forward.