通过在我厂蒸馏装置上软仪表的具体使用情况，简单介绍了基于RBF 神经网络的软仪表的开发，RBF 神经网络的特点、在建模中的应用及RBF 神经网络改进后的模型应用。开发软仪表的目的，及在实际使用中对现场生产的指导意义。关键词：蒸馏装置；软仪表；RBF 神经网络；模型训练Abstract: With the use of simulating instrument in the Distillation Unit, following aspects on simulating instrument have been described briefly in this paper including the development of simulating instrument based on RBF Neural Network, the characteristic of RBF Neural Network and the use in model establishment, the model use in modified RBF Neural Network as well as the purpose for the development of simulating instrument and instructive function of simulating instrument in field operation.Key Words: Distillation Unit, simulating instrument, RBF Neural Network, model practice.