Article focuses on the heating environment of dormitory rooms. Numerical simulation methods are applied, and the FLUENT software is utilized to study the impact of curtain settings on the comfort level of dormitory rooms. By establishing a detailed dormitory model, setting multiple working conditions, and conducting simulation analysis of the temperature distribution in the dormitory under different curtain settings (such as length, opening and closing degree), as well as outdoor air infiltration speed, outdoor temperature, and radiator temperature, and obtains the influence law of curtain settings on dormitory comfort. Simulation results show that during dormitory heating, the vertical temperature difference between upper and lower bunks reaches 0.2–1 °C, while the horizontal temperature distribution is relatively uniform; higher radiator temperature significantly increases indoor temperature; curtain settings affect indoor temperature distribution, with curtain length having a greater impact. These results provide a reference for optimizing the dormitory thermal environment.