Abstract: In order to control the weed of tea plantations, in this paper, the species diversity of weeds was investigated and analysed in the 6 tea plantations of the Anxi County, Fujian province, China from 2012 to 2014. The results indicated that there were 35 families, 94 genera, and 140 species of weeds in the investigated tea plantations. They were primarily the poaceae weeds with 27 species and asteraceae weeds with 19 species, accounting for 19.29% and 13.57% of total species, respectively. The most was the dicotyledon-weeds with 28 families, 68 genera, and 103 species, accounting for 80% of total families, 72.34% of total genera, and 73.57% of total species, respectively. The second was the monocotyledon-weeds with 4 families, 23 genera, and 34 species, accounting for 11.43% of total families, 24.47% of total genera, and 24.29% of total species, respectively. And the least was the pteridophyta-weeds with 3 families, 3 genera, and 3 species, accounting for 8.57% of total families, 3.19% of total genera, and 2.14% of total species, respectively. The proportions of the annual- or the biennial-, and the perennial-weeds were 66.43%, 27.86%, and 5.71% of total species, respectively. In conclusion, these results showed that the predominant weeds in the tea plantations of the Anxi county was the poaceae-, dicotyledon- and annual- weeds. These findings supplied a basic data of the species diversity of weeds in the tea plantations of the Anxi County, and would be as the cornerstone of integrated weeds management for tea plantations.