The accuracy of load forecast directly affects the plan of smart grid and many other problems. In some economically underdeveloped areas,due to the impact load with larger volatility,which has a certain influence on the accuracy of load forecasting, but the common load forecasting methods in dealing with this kind of load have some defects. In this paper, a short-term load forecasting method based on Savitzky–Golay filter is presented.We use the processed data to do load forecasting,and compare with the untreated data forecast results.As a result,the method based on Savitzky-Golay can effectively eliminate the influence of impact load on load forecasting and improve the accuracy of load forecasting.Also,the method is easy to understand and use, and has good practical value.