Ecological security classification of land resources play an important role in sustainable utilization of land resources and improve benefit of healthy development of urbanization in China. According to the county level of ecological security classification of land resources data which is large scale and imbalance, this paper presented a support vector machine (SVM) model to classify the county level of ecological security of land resources. The method was compared with artificial neural network, decision tree, logistic regression, and naive Bayesian classifier regarding the county level of ecological security of land resources classification for Guanzhong urban agglomeration. It is found that the method has the best accuracy rate, hit rate, covering rate and lift coefficient, and provides an effective measurement for county level of ecological security of land resources classification and prediction.