Abstract: In order to measure the slurry droplet content at the outlet of demister in desulfurization system more accurately,the advantages and disadvantages of determination method for slurry droplets at the outlet of demister were analyzed,and the national standard slurry droplet sampling method was optimized. An improved slurry droplets sampling method was proposed,which can realize equal-speed velocity sampling and is a simplified method for measuring and calculating the concentration of slurry droplets. Furthermore,comparative experiments were carried out.The experimental results show that there is a large escape rate in the national standard slurry droplet trapping method.Compared with the improved slurry droplet sampling method,the escape rates of the national standard slurry droplet sampling method are 39.84% and 41.41% in Unit 1 and 2 respectively,and the average escape rate is 40.6%.The improved slurry droplet sampling analysis method can measure the slurry droplets entrained by purified flue gas after the demister more accurately,and it can provide the basis for the performance evaluation of desulfurization system.