Abstract: In order to control weeds effectively in tea plantations, the density, species and life forms of main hazardous weeds were investigated and analyzed in new and old tea plantations in Anxi, Fujian from 2012 to 2014. The results of weeds density showed that new and old tea plantation had 27 and 33 species of weeds, respectively. The results of weeds species showed that the proportion of Asteraceae, Euphorbiaceae and Poaceae weeds was the highest, which occupied 22.22%, 11.11% and 25.93% in new tea plantation, and 12.12%, 12.12% and 18.18% in old tea plantation, respectively. The results of weeds life forms showed that annual weeds were the main hazardous weeds in tea plantations, which occupied 77.78% of the total weeds in new tea plantation and 69.70% in old tea plantation. In conclusion, the major weeds in new tea plantation were Pennisetum alopecuroides Setaira viridis Digitaria sanguinalis, while those in old tea plantation were Pennisetum alopecuroides Eleusine indic Digitaria sanguinalis. The predominant weeds in tea plantations were poaceae and annual weeds. This study provided basic data for the diversity analysis of weeds in tea plantations of Anxi and provided foundation for integrated weeds management.