The invention discloses a commercial complex intelligent evacuation method based on LORA. The method comprises the steps of 1, arranging a commercial complex intelligent evacuation system; 2, collecting fire information; 3, judging whether a fire occurs in the commercial complex or not; 4, generating a road network; 5, determining an optimal evacuation path; 6, the commercial complex intelligent evacuation system assisting in personnel evacuation; and 7, updating the road network until all people are safely evacuated. According to the invention, by utilizing the advantages of long transmissiondistance, simple networking and low price of the LORA technology, a commercial complex intelligent evacuation system is constructed; by combining with a load balance principle during evacuation pathplanning, and taking an area with personnel as a target group, the fastest safe evacuation path is generated according to the fire scene information, meanwhile, the fire scene internal information isaccurately obtained through the fire information monitoring module, the road network and the optimal evacuation path are optimized and updated, the number of people at each emergency exit is evenly distributed, the utilization rate of each emergency exit is increased, and the personnel evacuation speed is increased from personnel diversion.