Information anti-theft method and system applied to business user big data

The invention relates to the technical field of big data and information anti-theft, in particular to an information anti-theft method and system applied to business user big data. Determining a matching relationship between the abnormal session behavior description of the marked interactive behavior event and the abnormal session behavior description of at least one group of first auxiliary interactive behavior events, so that the determined risk event knowledge base has the description content of the marked interactive behavior event in the to-be-analyzed user service interactive record, a relatively complete matching degree exists between the determined risk event knowledge base and a marked interactive behavior event, and meanwhile, the determined risk event knowledge base can be matched with a set business scene theme; and accurate and reliable information stealing protection processing can be carried out based on the information stealing intention relationship network corresponding to the marked interac