With the continuous development of the economy, the number of SMEs is increasing, not only creating a lot of economic value for the country, but also solving many people's employment problems. Therefore, SMEs have also become an important part of the national economy. However, there are still many obstacles to the development of SMEs. Among them, the important issue is the difficulty of financing. Therefore, this paper aims to study the impact of internal factors of small and medium-sized enterprises on corporate financing. Through the analysis of other researchers, the status quo of SME financing, financing methods, financing difficulties, financing strategies, using Eviews software, through scatter charts, statistics Descriptive, regression analysis and other methods draw conclusions and put forward feasible suggestions on this issue. SMEs themselves and banks and other financial institutions work together with the government to cooperate and cooperate in order to fundamentally solve the problem of financing difficulties for SMEs.