Sometimes the circle-section element bears bigger moment with less axial force in a project. In this condition, the compressive region of the concrete will be arched, occasionally will be triangular for sometime. Although the above two situations are not so common as the situation of rectangular pressed, the solutions are still have certainly realistic meaning to the project. This article describes the design method of the positive section bent bearing capacity under the above two situations. According to the test, the operation under the two situations is quite simple a...