In order to provide a better train for IT major students and enhance their ability of theory combining with practice, most higher education schools are looking for experimental equipments adapt to their own laboratory conditions and teachers. Ethernet switch practice teaching is an important part of computer network teaching course, so there is being such need, too. Aim at meeting such Ethernet switches' market demand in a university's computer network laboratory, it designed a Miscellaneous Ethernet Switch Simulation Teaching System. Based on an overall consideration of the current stage and development trends of Ethernet switch, system functional requirements and feasibility, it used a three-layer architecture--hardware layer, driver layer and software application layer, and realized using hardware combined with software method. This thesis, using Realtek's Ethernet controller RTL8309SC and TI's single-chip MSP430F149, successfully builds a hardware supporting platform with standard interface, achieve the goal of hardware layer and driver layer. It not only provides a real network environment of good cost performance for users, but also flexibly provides hardware related Ethernet switch teaching experiments as a result of independent researching and development, has a strong practical value.