Since the power transmission line(PTL) passes through the high area and heavy snow fall region, it is necessary to keep the stability of the PTL. In this study, PTL is modeled as a mass-spring-damper system. The cross section of the PTL is considered by no icing, triangle and ellipse shape. The wind force coefficients for each cross section are derived by using the commercial CFD program, ANSYS Fluent. The occurrence of galloping according to the attack angle is analyzed for each shape. Galloping simulations are performed for three regions by applying wind force coefficient to the lumped mass model. Dynamic behavior and frequency of the PTL are analyzed according to the each region and cross section.