The invention discloses a heterogeneous social network cross-platform associated user account mining method. The invention discloses a heterogeneous social network cross-platform associated user account mining method. The method comprises the steps that for different social network characteristics, respective social network structures are established, the structure of any social network OSNi is represented by a graph G (i) = (V (i), R (i)), V (i) represents a vertex set and is composed of multiple different types of vertex sets in the social network OSNi, and R (i) represents a relation set between vertexes. The heterogeneous social network cross-platform associated user mining method comprises the four steps of construction of a social network structure, extraction of a user interaction element path, migration and embedding of a single social network and cross-social network migration and embedding and associated user account mining. The method has the advantages that cross-platform unified embedding is achieved, and the problem that efficient cross-network platform embedding cannot be achieved in the prior art is solved.