Abstract: Through the literature research，some main problems of selecting dedusting technical paths in China’s coal-fired power plants were analyzed in this paper． The results show that ESP technology has poor adaptability to the coals in China from the sulfur content of coal，dust specific resistivity and dust particle size distribution． In addition，through the research results of the predecessors’comparison of mercury removal and protection of wet desulphurization equipment，it has been found that bag filter has better efficiency of mercury removal; due to the higher dust removal efficiency，the wet desulphurization equipment would operate safely and reliably for a long time．