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This paper analyzes a variety of factors that affect public budget revenue. The data set is the Shanxi Provincial Statistical Yearbook collected from 1999 to 2021 years. This study uses the lasso regression method to select multiple factors affecting public budget revenue. The key influencing factors were retained. Then the GM (1,1) model was used to predict the data of each influencing factor in 2022 and 2023. Finally, SVR and neural network were used to forecast the public budget revenue in 2022 and 2023 and the advantages and disadvantages of the two models were compared. The results show that the general economic pattern of Shanxi province will be positive in the future. The public budget revenue of Shanxi Province will further increase.