The invention discloses an address trimming and complementing method based on a knowledge graph and multiple matching and application, and the method comprises the steps: employing a word segmentationtool to perform word segmentation operation of input address text data, constructing an address noun dictionary for matching word segmentation, and performing matching recombination according to a place name rule; acquiring address administrative division data, constructing an address knowledge graph by adopting a database management tool, acquiring old name or alias information of place names, and associating the old name or alias information of the place names with corresponding place names in the constructed address knowledge graph; according to the characteristics of address composition,constructing a plurality of matching rules for matching, adopting corresponding matching rules to correct and complement addresses, wherein the matching rules comprise a preceding text missing matching rule, a preceding text full missing matching rule under the duplicate name condition, a preceding text adjacent missing matching rule under the duplicate name condition and an old name alias correction matching rule. According to the invention, correct, efficient and normative trimming and completion of addresses with default information or even errors are achieved.