Abstract: Multi-functional low-voltage power distribution comprehensive practical training device is a practical teaching link on the basis of learning the commonly used low-voltage electrical equipment, electrical control lines, typical low-voltage power distribution and other chapters. Its purpose is to train students and new recruits to master the necessary basic skills and professional knowledge, through learning to make students and new recruits familiar with and master a variety of common low voltage electrical equipment structure, working principle and use method, preliminary master the comprehensive basic control of low voltage distribution principle, connection rules, troubleshooting, learning common low voltage distribution integrated circuit structure, working principle, fault analysis and troubleshooting method.