Abstarct: Power transmission towers are one of the most important components of the power supply network, which must bear the weight of very heavy conductors with respect to the safe height from the ground. Power transmission towers are divided into two categories: lattice towers and monopoles. It is very difficult to get land in urban areas for installation of conventional lattice towers for power transmission. Poles are suitable alternative to the conventional lattice towers. Towers are used in different weather conditions and wind load is the most dominant load. In a static state, these structures are under the weight of cables and insulators and the weight of snow and ice in cold regions. Power transmission poles are subjected to dynamic cantilever bending due to wind gusts and cable unilateral failure, or may also be subjected to vehicle impacts. From this point of view, the vibration analysis of these poles as well as the determination of the natural frequency and vibration modes are of particular importance. Today, the tendency to use composite materials in the structure of transmission towers has increased. Therefore, the detailed study of the dynamic behavior of transmission towers made with composite materials, which are considered for tall structures, is important. In this research, vibrations of the 63 kV double-circuit composite power transmission monopole under different loads are investigated. The governing equations of the system are obtained by using the Euler-Bernoulli beam theory and the energy method. The Glerkin method is used to discretize the equations. Also, the vibration response of the pole under different loads is obtained. The effect of thickness, material, weight of pole, weight of cross arms and fiber orientation on natural frequencies are investigated. Also, the analytical results presented in this work are compared to analytical results from Abaquse finite element software. The results of this research can be used in the production of rigs with less weight and longer life.