The structure of LMF Air Compressor is composed of diesel engine, screw compressor and piston compressor installed on a common base, including cooling system, control system, lubrication system and power transmission system. LM F Air Compressor has the characteristics of reliable operation, low failure rate, high degree of automatic control, and suitable for offshore operations. LM F company is a well-known manufacturer of piston high-pressure Air Compressors in Austria, mainly producing air, natural gas, chemical and industrial gas compressors. This article mainly introduces the relevant technical parameters and basic structure of the Air Compressor, and the working cycle of each subsystem, so as to improve the operating level of the staff on the Air Compressor.