Similar sample determination method and credit line determination method

The invention relates to a similar sample determination method and device, a credit line determination method and device and a storage medium. The similar sample determination method comprises the following steps: acquiring a to-be-analyzed sample set and customer information of customers without credit line; sequentially classifying the to-be-analyzed sample set according to a plurality of preset features to obtain a plurality of sample subsets, and forming a sample binary tree by the plurality of sample subsets by taking the plurality of preset features as cross nodes; searching a target sample subset similar to the customer information from the sample binary tree according to the customer information; and obtaining the similarity between each sample in the target sample subset and the customer without the credit line, and taking the sample of which the similarity exceeds a preset threshold as a similar sample of the customer without the credit line. By adopting the method, the accuracy of the similar sampl