LM series aero-derivative gas turbines are widely used in regional natural gas distributed energy system. However, due to the lack of operation and maintenance experience, the differences of operating environment and equipment defects, the reliability of LM series aero-derivative gas turbines in the actual operation process in China is less than expected. In particular, major failures of LM series aero-derivative gas turbine occur frequently, which seriously affect the production and operation of distributed energy enterprises. Aiming at the typical faults of LM series gas turbines in the actual operation in China, such as fracture of compressor blades, blocking of fuel nozzle and failure of bearing, this paper introduces the phenomena of the faults, analyzes the causes of the faults, and puts forward the treatment measures and prevention suggestions. These suggestions include inspection and supervision of water and oil, routine inspection and maintenance of key parts and malfunction prone points, and elimination of hidden troubles. Through the analysis of typical faults, this paper is helpful for distributed energy projects that have been in production or under construction to learn from each other, and it is conducive to improve the level of equipment management, avoid similar faults and ensure the reliable and stable operation of aero-derivative gas turbines.