  The possibility of immunized and improving the entanglement of accelerated
systems via local filtering is discussed. The maximum bounds of entanglement
depend on the dimensions of the accelerated and the filtered subsystems. If the
small dimensional subsystem is accelerated and the large dimensional subsystem
is filtered, one can get a long-lived entanglement. Moreover, if the larger
subsystem is accelerated, then by filtering any subsystem, the upper bounds of
entanglement of the filtered state are larger then that for the initial
states.For any accelerated subsystem, the entanglement always increases as the
filter strength of the large dimensional subsystem increases.
