Abstract: FDS fire modeling software has been used to analyze development law of the flame in the LNG fire scenarios set. The middle one of 3 LNG storage tanks of a gas company in Guangzhou was taken as a study object to set up fire scenarios and build a refined model for LNG storage tankfarms, so as to carry out simulation analysis on overall fire situation, temperature field measuring point, cloud picture animation, isosurface animation, thermal radiation and hazardous flue gas areas. The results display that when a fire breaks out, the temperature in the vicinity of the tankfarm control room will be much higher than the danger judgement value, scope of hazardous area will follow a large change after 30 s and 110 s and the areas for smoke layer temperature higher than 180 ℃ and flue gas hazard will be within the limited range between the storage tank and control room. Therefore, the wall of a building facing the side of the fire source shall be kept away in the process of evacuation.