Data security interaction method suitable for multiple systems

The invention discloses a data security interaction method suitable for multiple systems, which comprises the following steps: extracting a data target list in a data acquisition request, and classifying data targets in the data target list to obtain an intranet information target set and an extranet information target set; the first extranet end traverses the first extranet data based on the extranet information target set to obtain first target data, and if the intranet information target set is an empty set, the first target data is encrypted and then sent to the second extranet end; if the intranet information target set is a non-empty set, the first extranet end transmits the intranet information target set to the first intranet end based on a first ferry transmission unit, and the first intranet end traverses the first intranet data based on the intranet information target set to obtain second target data; and the first target data and the second target data are encrypted and then sent to the second ext