The atmospheric sensor is important measuring instrument to get external atmospheric parameters of the plane. Parameters include: temperature, Angle of attack, total pressure and total temperature, etc. For civil aircraft in flight safety is the first. If the precision of atmospheric sensor is not enough or arranged unreasonably, it would cause risk during the flight. The purpose of this article is mainly to verify the scheme of atmospheric sensor’s layout, to get the optimized schemes and the belt where the static pressure of the nose is constant. Simultaneously the way of verifying the layout of atmospheric sensors is to be constituted. The results of aerodynamic characteristics of atmospheric sensors are gained by the low speed wind tunnel test and scaled sensors (wind vane and seven-hole probe).It indicates that the layout is important to the results of the atmospheric sensors; The experimental results is agreed well with the calculated and satisfied with the requirement of the aerodynamic.