Effects of insulator surface treatment, liner thickness, and the time between the lining and casting on interface bonding property had been investigated in the way that interface bonding strength was tested using K/ J/ B and K/ J/ B/ Y rectangular specimen. The results show that bonding strength between non-precure liner and non-roughened EPDM insulator is only 1. 0 MPa. In order to ensure good bonding ,the surface of EPDM insulator must be roughened and cleaned first. When liner thickness is between 0. 3 to 0. 5mm, the bonding strength does not change. But when it increace to 0. 7 mm , the bonding strength is increasing. K/ J/ B/ Y specimen test is OK, break took place inside propellant. Time from 4h to 24h of end of lining and casting has little effects on interface bonding strength. Non-precure liner has no effects on standing process procedure.