Large-scale feature data storage method and device

The invention provides a large-scale feature data storage method and device. The method comprises the steps of obtaining to-be-stored feature data, wherein the feature data comprises data service types, features and values of the features; acquiring a data service type according to the data service type; searching a feature group corresponding to the data service type, determining a currently stored feature number from the feature group, sequentially storing the metadata of the feature in a metadata set according to the currently stored feature number, and storing the value of the feature in afeature value set according to the position of the metadata of the feature in the metadata set; during the storage of characteristic data, storing the characteristics of different data service typesinto the corresponding characteristic groups; according to the characteristic grouping mode, storing data of the same type in one characteristic group, wherein a column of data does not need to be stored at one position, and t