The adhesion phenomenon of rainwater on distribution wires involves intricate physical processes, particularly when the wires are in a state of vibration. Accurately understanding the dynamic behaviour of rain water film on vibrating wires is crucial for the development of rain shedding and anti-icing methods. First, based on the lubrication theory, we constructed a dynamic model of water film on a cylindrical surface under the actions of gravity, harmonic and impact excitations and developed an efficient numerical solution method based on the finite difference method. On this basis, the dynamic behaviours of water films on vibrating conductor are investigated, where the frequency and amplitude of the harmonic and impact excitations are taken into account. The results show that the vibration of wire leads to obvious oscillation of the water film for both the harmonic and impact excitation cases. A larger acceleration leads to greater changes in the water film morphology and a wider range of distribution angles. The results may provide theoretical guidance for the development of effective rain shedding approach.