A data processing method, includes: obtaining sample data in response to a user's input operation on a graphical interface, the sample data including characteristic data and detection data of samples; displaying a sample distribution diagram on the graphical interface based on the sample data; obtaining a focus threshold used for classifying positive and negative samples, the focus threshold being determined based on the detection data of the samples; displaying a mark of the focus threshold in the sample distribution diagram on the graphical interface; distinguishing data display effects of the positive and negative samples based on the focus threshold; and determining a cause of abnormality of the samples based on the positive and negative samples.