LNG exists in the form of multi-droplets in the liquid chamber spray pre-cooling process, and there is a lack of LNG multi-droplet evaporation model in the same vapor at this stage, so this paper adopts the method of computational fluid dynamics based on double droplets to establish a model applicable to the evaporation of LNG double droplets in its vapor.The new model was used to simulate the pre-cooling process in liquid compartments with temperature differences of 190 K, relative distances of 10 to 70, and particle sizes of 0.1 mm to 2.5 mm, obtaining some results of practical application: First, the temperature decreases faster at the beginning of the liquid chamber spray pre-cooling phase, and the greater the relative distance of the double droplets with increasing time, the smaller the liquid chamber pre-cooling end time. Second, the pre-cooling completion time of the two-liquid drop chamber is inversely related to the particle size and positively related to the starting temperature. Third, the new model is adapted to practical engineering applications.