This paper proposes a deep learning model combining convolutional neural networks (CNN) and Transformer for credit user default prediction.The model combines the advantages of CNN in local feature extraction and Transformer in global dependency modeling.Experimental results show that the CNN+Transformer model outperforms traditional machine learning models in accuracy, AUC, and KS value.The study provides a new idea for credit default prediction and supports risk assessment and intelligent decision-making in the financial field.