Abstract: The applications of linear compressor are more and more widely in cryogenic and refrigeration fields.It is very important to improve the performance and reliability of the linear compressor.In oil-free linear compressor,the flexible spring is used to support the piston,which often takes the form of multiple components.The flexible springs are assembled on the piston shaft.The flexible spring sheet is separated by a thin shim.Flexible spring technology can be combined with the gap sealing technology to realize no friction between the piston and the cylinder.At the same time,it can avoid the pollution problems caused by lubricating oil.In this paper,the theoretical analysis and finite element analysis of the flexible spring component are carried out.The spring component models are established based on ANSYS software.The effect of different thickness on the stress of spring component and the frequency of spring component varies with the number of spring sheet are studied.Effects of different component methods of various spring assemblies on clearance seal are studied.