Training artificial intelligence (AI) models is a complex process that is prone to some common mistakes. This article lists the 10 most common mistakes in AI project development. First of all, the quality of data preprocessing is important, as low-quality data can lead to model errors. Secondly, choosing the right development model is also crucial, and the applicability and evaluation accuracy of the model need to be considered. In addition, the consistency between model alignment and business metrics is also important. Only when the technical metrics are consistent with the business metrics can the expected business results be achieved. Data privacy protection is also a sensitive issue, and data protection policies need to be formulated and security audits need to be conducted. Insufficient scalability can lead to system overload, so an expansion plan needs to be planned in advance. Overfitting can occur if the model is trained too much, and the model parameters need to be updated to adapt to the changing data distribution. Training the model with non-real data can lead to reduced performance in practical applications. Algorithm bias is a common problem, and guidelines and rules need to be formulated to resist bias. The interpretability of the model is also important, and development documentation needs to be maintained to help users understand the decision-making process of the model. Finally, continuous monitoring of the performance and accuracy of the model is the key, and the model needs to be adjusted and updated in a timely manner. By avoiding these mistakes, safe, efficient, and ethical AI solutions can be developed.