Abstract: This article conducted an evacuation simulation of a commercial complex. By analyzing the evacuation process of its occupants, it is found that there are“bottlenecks”in the evacuation aisle, obstructions of the non- smooth corners, and clusters of“T"or“Y”shaped confluence.We adopted measures to increase the width of the bottleneck, change the shape of the contour of the aisle, and appropriately expand the width of the junction to form a buffer. The optimization results are good. In addition, the commercial complex had a low utilization rate for safe exits and stairs.The overall adjustment of the evacuation width of each exit will enable the evacuation of all safety exits to be carried out simultaneously to increase the utilization rate of the safety exits; the merging of adjacent stairs with a large difference in evacuation utilization rate will greatly increase the evacuation efficiency of the stairs.

Key words: commercial complex, people evacuation, optimal design, evacuation time