In this report, smoke Producoed by common mosquito-repellent incense and electric heating mosquito(-)repellent incense was compare tested by the PC-2 model aerosol Particle analytical instrument made in California Measurements, in. U S A Aerosol of mosquito-repellent incense was analytical studied on aerosol size distribution and its Pouution level. The result showed that greater part particles pro-ducted by mosquito-repellent incense are less than 2 um small particle. Aerosol pollution in house caused by electric heating mosquito-repellent ineense is not notable. But aerosol pollution in house caused by C-mon mosquito-rpellent incense is very serious.