A engineering method is used to simulate low oxygen and high temperature environment during altitude
flight of aerocraft by inert gases all around, in which the propellant-thruster sleeve made of composite material
actually works. Concretely, there are two experiment methods, loading the force and heat orderly, and loading the
force and heat at the same time. The analysis result of experiment data indicates these experiments are able to examine
mechanics capacity and high temperate performance of the propellant-thruster sleeve, not by actually starting up of the
engine in altitude flight simulation.