The invention provides a forecasting method of the industrial power-consumption intensity based on economic development mode transition. The forecasting method of the industrial power-consumption intensity based on the economic development mode transition includes: obtaining the historical data of industrial power consumption and industrial added values; taking the base year comparable price as the base and calculating the industrial power-consumption intensity of each year in historical sample intervals; calculating the industrial added value proportion of the four industries of the industrial departments of each year in the historical sample intervals; building a forecasting regression model of industrial power-consumption intensity of the target year and conducting a fitting test on the regression model; and conducting trend extrapolation by combining the government planning objectives, obtaining the proportion of the four industries of the target year and substituting the models to forecast the industrial power-consumption intensity of the target year. Through the building of the regression model of the proportion between the industrial power-consumption intensity and the industrial added values of the four industries of the industrial department, the forecasting method for the industrial power-consumption intensity based on the economic development mode transition considers the influence of the industrial structure and the policy factors on the industrial power-consumption intensity, forecasts the industrial power-consumption intensity of the target year, and improves the forecast accuracy.