  We present a practical entanglement distillation protocol (EDP) with linear
optics for a genuine mixed state. Each components of the genuine mixed state is
a pure less-entangled state.
  After successfully performing this EDP, we can obtain a high quality
entangled mixed state. Our EDP can work for both ideal entanglement sources and
current available spontaneous parametric down-conversion (SPDC) sources, which
makes it feasible in current experimental technology. Moreover, by using the
SPDC source, we can obtain a higher fidelity. This protocol can also be used to
distill the multi-partite entangled systems. All the features make it practical
and useful in current quantum communications.
