Caged regulating valve technology development is started late in our country. The traditional design process often depends on empirical formula. There is a great error between the experimental results and the design requirements of the product. Therefore, taking the sleeve of caged regulating valve as the design object, based on the theorem of orificeplate flowmeter, general formulae for the cross section of sleeve and cross section area under different opening of sleeve of four kinds of flow characteristics(linear flow characteristics, equal percentage flow characteristics, parabolic flow characteristics and fast open flow characteristics) were obtained. The model was built and simulation was made with FLUENT software. The experimental values of the relative flow of the regulating valve under different open degrees were compared with the design values. The simulation results show that the design method is reliable when the control valve opening is 30%~80%, which not only meets the design requirements effectively, but also has short design cycle, low cost and high accuracy. In addition, through the general area formula of the caged regulating valve’〖KG-*2〗s sleeve, sleeve with specific requirement can be gotten through change the pressure value of the inlet and outlet of the sleeve and different inherent flow characteristics, so it has certain engineering application value.