Abstract: In this paper, the temporal behavior of ultra-long waves forced by topography in winter is simulated by a β plan quasi-geostrophic model. It is shown that the ability of vertical propagation increases with increasing wavelength. Under the typical zonal mean flow in winter, the ultra-long waves with wave-numbers 1 to 3 can propagate upwards into the stratosphere, but the waves with larger wavenumbers are only significant in the lower troposphere. It is also shown that the ultra-long waves forced by topography tend to oscillate around certain longitudes and show stationary character due to the dynamic control of topography. These results are consistent with observation and the results deduced from other theoretical studies.