Illino non-continuous rubber sub-plate is special for concrete foundation non continuous flexible rail fasten system. Non continuous rubber backing plate to meet the requirements of different applying condition, Illinois designs M-type, W-type and P-type. On the other hand, in order to satisfy different working condition, through improvement of technical process, Illinois put forward S-type rubber backing plate. S-type rubber backing plate improved a lot compare with traditional normal rubber plate at tensile strength and compression strength which could meet the conditions of high speed and heavy load.