In order to study the structural performance of freight ropeway under the influence of dynamic factors, a method for dynamic analysis and calculation of freight ropeway is proposed. Based on the theory of finite particle method, this method gives the expressions of the interaction force between the carrying rope and running trolley, and the haulage rope and running trolley. The motion equations of the particle of the carrying rope, traction rope and running trolley are established respectively, and the coupling force calculation of the carrying rope and traction rope is realized. The influence of load quality, starting speed and starting position on the tension of working-rope of freight ropeway is analysed with the proposed calculation method, which can provide more scientific and reasonable reference for the design of freight ropeway.