The actual rough land surface is simulated with the exponential type distribution rough surface and Monte Carlo method, the wideband back electromagnetic scattering from rough land surface and column with equilateral triangle crosssection above it under UWB Gaussian pulse electromagnetic wave incidence is studied using FDTD. The curves of back electromagnetic scattering coefficient varied with frequency are obtained by numerical calculation. The back electromagnetic scattering coefficient varying with frequency is analyzed under the difference of the rootmeansquare of rough land height fluctuation, correlation length and the moisture capacity of soil, the side length of triangle, tilt angle, height and dielectric parameter. The characteristics of the wideband back electromagnetic scattering from rough land surface with the exponential type distribution and column with equilateral triangle crosssection above it are obtained.