A micro turbine jet engine

as a research object

was studied in order to conduct the design process and methods of micro turbine jet engine rotor system.Firstly

this paper introduced the engine and it's rotor system structures

generalized the design principles of rotor system

and then emphasized the design process of rotor system from bearing choices

rotor dynamic characteristics

vibration absorber techniques

rotor dynamic balance and bearing failure formats.These design experiences can be references for improving design ability of domestic micro turbine jet engine.