本文为嘉兴发电厂附近潮间带底栖生物背景调查报告。调查结果表明：本调查区域大型底栖动物较贫乏，经鉴定有５６种；栖息密度和生物量均偏低，平均栖息密度为６９．９个／ｍ￣２，平均生物量为１６．３８ｇ／ｍ￣２；大部分断面生物种类和数量都有从高潮区向中潮区递增、中潮区向低潮区递减的趋势；各断面生物垂直分布大同小异。 This paper is the background investigation of intertidal benthos near Jiaxing Power Plant. The survey results showed that the macrobenthos were scarce in this survey area, of which 56 species were identified. Their habitat density and biomass were low, with an average habitat density of 69.9 / m 2 and an average biomass of 16.38g / m ~ 2. Most of the species and numbers of the organisms in the cross-section showed an increasing trend from high tide zone to mid-tide zone and a trend of decreasing from mid-tide zone to low-tide zone. The vertical distribution of organisms in each section was similar.