Abstract
With the rapid development of big data and Internet technologies, companies engaged in big data financial platforms collect and systematize massive data through their own platforms, improve credit scoring parameters and use machine learning methods to conduct complex and scientific credit scoring assessments. Thus, banks face big problems when building credit scoring. Based on the limitations of the existing system and methods of personal credit rating, it is necessary to study personal credit rating based on machine learning methods, improve the parameters and scoring system of personal credit rating, clarify data collection channels, use dynamic desensitization technology. To reduce the sensitivity of the data, the LOF test method is used to verify the emission data and the random forest method is used to fill in missing data values. Then you use the gradient-boosting decision tree method to view important indicators, process proven indicators using a metric system model based on logistic regression, and get a personal credit score. Finally, the model is tested using a BP neural network, and the model is used to predict the level of personal credit. The study shows that machine learning can further improve the accuracy of individuals' credit ratings and provide a scientific basis and background information for commercial banks' credit ratings.