In this paper, principal component analysis was used to analyze 8 water quality indexes in 6 sampling points of Wudalianchi Drug Spring Lake in the mean water period of 2010, at the same time, spatial distribution of water pollution characteristics was studied. The results showed that: permanganate index was the primary factor, which affected the water quality of Drug Spring Lake; the water was polluted seriously by organic pollution; waterfall water outlet was the most polluted sampling point, and the outlet was the Drug Spring Lake's entrance. So, it is important to pay close attention to the man-made point pollution of Drug Spring Lake and strengthen environmental management.%采用主成分分析法在2010年平水期对五大连池药泉湖6个采样点的8个水质指标进行分析,同时研究药泉湖水体污染的空间分布特征.结果表明:高锰酸盐指数是影响药泉湖水质的首要因子,即有机污染对水体污染的贡献最大；瀑布出水口采样点污染最严重,该出水口为药泉湖观光景区入口,因此要密切关注药泉湖人为点源污染,加大景区环境管制力度.
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