Statistical experiment method is applied to conduct energy consumption analysis on the fiber preparation unit of domestic typical fiberboard production manufacturer, the energy consumption composition for producing unit quality fiber, the share of energy consumption, and the main factors affecting fibers unit energy consumption are obtained. Through the test data of actual production, for the each process of fiber preparation unit, the consumption of electric energy and thermal energy in terms of standard coal is quantitatively analyzed and calculated. Based on the analysis and calculation, results indicate that the total energy consumption for 1t fiber is 162.434kg(ce); the ratio of electric energy consumption to heat energy consumption is about 1:4.49. Among the processes, dry and hot mill are the process of main energy consumption, accounted for 65.199% and 33.681% of the total energy consumption, respectively; the consumption proportion of electric energy and heat consumption is 1:17.4 and 1:1.75, respectively; and the research provide the theoretical basis for taking further effective stapes saving energy and reducing consumption.