Provided are a method and device for data processing and a storage medium. The method includes: inputting labeled training data in a training set into a preset model to be trained and updating the model parameters of the preset model; inputting labeled verification data in a verification set into the preset model after the model parameters are updated to obtain a first prediction label; obtaining a verification loss value based on a difference between the first prediction label and a marked label of the labeled verification data; determining an auxiliary loss value based on current structural parameters of the preset model; determining whether to stop training the preset model based on the verification loss value and the auxiliary loss value; and classifying data to be classified based on a target network model constructed by a network structure included in the trained preset model to obtain a classification result.