Ant colony optimization（ACO） algorithm is led into training of and neural networks

which based on ACO algorithm and the implementing framework of ACO.The basic theory and steps of ACO training neural networks are given

and applied in fault diagnosis of engine’s gear box.By use of conventional"frequency domain"analysismet hod

ant-neural networks fault diagnosis of gearbox is carried out.It is proved that fault diagnosis of engine gear box based on ant-nerual networks has upper precision and diagnosed gearbox t effectively

so improved effectiveness and quality of diagnosis.