Abstract: In order to explore the situation of light aircraft wing and tail aerodynamic interference, and acquire the aerodynamic characteristics of the horizontal tail height position in two cases, this paper studied the aerodynamic characteristics and effect with high and low layout of the horizontal tail wing in different wind speed and angle of attack. The research results show that in normal flight attitude,the wing wake flow interference that the high horizontal tail accepts is relatively small than the low one,that the high horizontal tail aerodynamic efficiency is relatively high and that the whole performance is more fine. This test results can be used for light aircraft design reference.