With the continuous improvement of information and communication technology, the popularity of mobile terminals and endless new technologies, the application of mobile Internet is increasingly extensive. This paper mainly studies the multi-source data analysis method based on mobile Internet. Through the connection of multi-source database, the data is associated and the foundation of data fusion is constructed. It is stored in the specified storage database or data medium according to certain rules. On this basis, first of all, preprocess the data, sort out and correct those disordered storage formats, disordered data records and redundant fields to form standard data. Secondly, these data are cleaned to remove data redundancy and noise. Through the combination of multi-source data, new data records are obtained, and these data are sorted and improved. According to the actual situation and problems of the project, the multi-source data is fused to build an effective data set. Data show that the accuracy of the model can reach more than 85%. The results show that mobile Internet technology can provide security and risk information for the participants of the exhibition.