Abstract: Classification models construction method, a data prediction method and an electronic device are provided. The classification models construction method comprises: obtaining a first-level sub-model based on a first model, and obtaining a first target model according to a prediction accuracy of the first model for training data and a prediction accuracy of the first-level sub-models for the training data. Where, the first model is an initial model or an N-th-level sub-model obtained based on the initial model, N is an integer greater than or equal to 1; the first target model is any one target model in a plurality of target models; and the initial model is a random model obtained based on an automated machine learning method.