介绍了负荷预测的特点以及影响预测负荷准确度的成分，并通过实际数据曲线形象地对其周期性、趋势性和节假日负荷的特点以及温度、湿度等影响因素进行分析。(This paper introduces the characteristics of load forecasting and the components that affect the accuracy of forecasting load, and analyzes its periodicity, trend and holiday load, as well as the influence factors of temperature, humidity and so on through the actual data curve.)