The proposed LPPAE method in this paper combines the conventional LPP and Autoencoder creatively. The idea of LPPAE can be made as a general framework and then extended to variants of LPP, so a series of new methods of LPP can be derived. And, the idea of LPPAE can also be extended to the other manifold-based dimensionality reduction methods, for example IsoP, NPE, LLTSA, etc., so that these methods will have new versions and achieve better performance.