Deformation of microshield lines is unavoidable during use.In this paper,the transmission characteristics in deformed rectangular shaped and V shaped microshield lines by edge based finite element methods discussed.The transmission characteristics include the cutoff wavelength of dominant mode,single mode bandwidth and the field patterns of dominant mode.The calculation results show that the deformation of the two kinds of microshield lines has a great influence on three transmission characteristics.These numerical results have strong guiding significance for the influence of deformation of the two kinds of microshielded lines on the overall device.