Data processing method and device and storage medium

The invention provides a data processing method and device and a storage medium. The method comprises the steps of obtaining to-be-processed data; processing the to-be-processed data by using the decision tree model to obtain a processing result of the to-be-processed data; wherein each tree model in the decision tree model is obtained by training a plurality of pieces of sample data subjected to grouping calculation and intermediate data corresponding to a plurality of pieces of remote sample data sent by the second server. Each tree model in the decision-making tree model in the scheme needs the second server (namely a partner) to send the intermediate data, the intermediate data and the multiple pieces of sample data subjected to grouping calculation are subjected to joint training to obtain the tree model, basic data of the second server is not needed to enable data of the partner not to be leaked, and due to the fact that the multiple pieces of sample data are subjected to grouping calculation, data leak