Abstract: In order to increase the thermal utilization and final collection rate of the steam huff - puff production of the heavy oil in Wangzhuang Oilfield, positive and complex geology model of the main reservoir have been set up based on the real geological data. We applied a NUSMIP steam- injection, 3 dimension & phase and multi- group simulation software to make numerical simulation research on separated layer production and commingled production steam huff- puff exploitation, which showed that separated production is better than commingled production.