Abstract: The neural network prediction technique based on the im pulse guidance is discussed. On the basis of the theory of discrete constrained optimal Lagrange multiplicator, we avoided to accept test points sightlessly wit h the simulated anneal technique from the approximate grades through the forward propagation method, and accelerated the search speed using Relaxed & Tighten st rategy. The experiment result shows that the training error and the prediction e rror have been improved greatly. Keywords: 收稿日期：

Key words: violation guide, prediction, neural networks