When sheet accepts common load, we always divide the load into two components. One is transverse load, which is perpendicular to middle plane, one is longitudinal load, which acts in middle plane. For the latter, we assume its distributing is even along the thickness of the sheet, and treat it as the plane stress problem. In this chapter, we just discuss the stress, Strain and displacement when sheet is bent because of transverse load7 When sheet accepts common load, we always divide the load into two components. One is transverse load, which is perpendicular to middle plane, one is longitudinal load, which acts in middle plane. For the latter, we assume its distributing is even along the thickness of the sheet, and treat it as the plane stress problem. In this chapter, we just discuss the stress、strain and displacement when sheet is bent because of transverse load