Secure storage method for big data

The invention relates to the technical field of electric digital data processing, in particular to a secure storage method for big data. The method comprises the following steps of performing data acquisition and data screening processing on a big data platform to obtain an unstructured data set; performing matrix classification and data identification processing on the unstructured data set to obtain an unstructured data identifier; performing node parallel distribution storage and frame backup processing based on the identifier to obtain and construct an unstructured data parallel distribution storage frame and a backup frame; monitoring and storing the unstructured data parallel distribution storage framework and analyzing abnormal flow velocity to obtain node data abnormal flow velocity; performing parallel test data injection monitoring on the unstructured data parallel distribution storage framework, and searching abnormal data backup; and covering the data in the abnormal storage node based on the back