[Purpose/significance] In order to make up the defect that the LDA model does not consider the factor of document attention and quality in web text,and to enhance the semantic interpretation and topic representing ability,this paper proposes a model for web text topic mining based on heat weighted HLDA-IDF.[Method/process] This paper first defines heat specifically,and combines with LDA model to construct the HLDA model.Then,as different terms have different topics representing abilities,the paper introduce...