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In this paper, some properties of perfect Lie superalgebras are investi-gated. We prove that the derivation superalgebra of a centerless perfect Lie superal-gebra of arbitrary dimension over a field of arbitrary characteristic is complete and we obtain a necessary and sufficient condition for the holomorph of a centerless perfect Lie superalgebra to be complete. Finally, some properties of perfect restricted Lie superalgebras are given.