摘要：water-spraying is regarded as an effective method to reduce the weight loss of product during vacuum cooling *** study aimed to investigate the effect of vacuum cooling factors on the weight loss of postharvest broccoli,and attempted to optimize the treatment conditions by simulated annealing(SA)*** algorithm based on simulated annealing meta-heuristic technique was developed to identify the optimum condition for vacuum cooling treatment of *** demonstrated that the SA algorithm could adjust well with the simulation of the broccoli cooling *** best condition was at 200 Pa of pressure,274 g broccoli,6% of water volume and 40 min processing *** this condition,a product with only 0.35% of weight loss and 1.48℃ final temperature was *** developed method may help to effectively control the weight loss during vacuum cooling process and reducing the economic loss.