The co-generation of heat and power in heating units is extremely complex, which is reflected in the huge number of combination modes among the power generation, heating load and heating mode. It is a typical multidimensional data model. With the help of numerical simulation software, the influence of cogeneration on unit operation economy and peaking output is studied, and the heat consumption rate and coal consumption rate of heating unit under typical working conditions are calculated according to DL/T904-2015 Method for Calculating Technical and Economic Indicators of Thermal Power Plant’, so as to guide the production and operation management of power plant.