Refining method of Internet of Things equipment fingerprint database

The embodiment of the invention provides a refinement method of an Internet of Things device fingerprint database. The method comprises the following steps: verifying whether the equipment informationmatched with the network data packet by the equipment fingerprint library meets the accuracy requirement or not; if not, screening the fingerprint as an unqualified fingerprint; judging whether the clustering result of the network data packet of the unqualified fingerprint reaches a refinable condition or not; if so, determining that the unqualified equipment fingerprint is a to-be-refined fingerprint, performing fingerprint feature expansion on a clustering result of the to-be-refined fingerprint to obtain an expanded fingerprint and new equipment information corresponding to the expanded fingerprint, judging whether the equipment information matched with the network data packet corresponding to the expanded fingerprint meets a precision rate or not, and adding the expanded fingerprint into an equipment fingerpr