In this paper, the ventilation methods of kitchen in residence are classified into three kinds (“一”，“L” and “Z”）. Mechanical ventilation must be adopted in the kitchen in residence. The ventilational characteristics are studied with the help of CFD analysis method. In the aspects of building design, if inlets and outlets of the kitchen in residence were well arranged, a good airflow distribution would be acquired, the contamination in kitchen would be exhausted effectively and the indoor air quantity of the kitchen would be improved.