In order to improve the wind resistance of single-storey house in the rural areas, this paper has carried countryside house's rigid model on the wind tunnel test in view of the south area. This paper has studied coefficient distributed rules of the single-layer house building and calculates the shape coefficient under various wind angles, and draws the build coefficient distribution figure finally. The result indicated that when the wind angles are 0 or 90 degrees, the front wall is most unsafe. When the wind angles are 60, 90, 150, 180 degrees the back wall is unsafe. When the wind angles are 0, 180 degrees wind angles, the flank wall are unsafe. But speaking of the entire house, 0 degrees wind angles is the unsafe wind angles.