The embodiment of the invention discloses a search engine speeding up method and device. The search engine speeding up method includes that a search engine receives a search keyword input by a user, and the search engine outputs the first N search results meeting a condition according to the search keyword; the first N search results include document matching scores, document addresses ID, and search engine shards, wherein the N is a mass-level positive integer; the document addresses ID are expressed by a bitmap data structure, an internal data serial number of the bitmap data structure matches a sequence of the search results, and a bit is used for expressing whether or not a document is saved in a position corresponding to the internal data serial number. The technical scheme provided by the invention is fast in search speed, and uses less space memory.