If manpower planning could not respond society economic transit in time, the structural unemployment will be the major reason of the rising unemployment rate. Therefore, manpower planning is an urgent task. The artificial neural networks can be used to predict. Because artificial neural network models have an advantage via analysis models, so the model complexity can be adjusted to match the complexity history of the manpower resources by using manpower resources history as input, without any assumptions. In this paper, using back-propagation neural network for predicting the manpower demands of labor market and to provide reference in manpower planning.