To guarantee the normal running of gas generators,it is important to control the burning residue produced from the generator liner. By properly reducing the content of curing agent,TMTD,adjusting the curing time and avoiding post-curing,the best TMTD content of 0.4～0.5 g in 100 g butadiene-acrylonitrile rubber based liner and 4 h of curing time is determined. The experimental results show that after high temperature aging test of the liner,the gas generator can normally work.